6 (six) is the

^{2}, where $\backslash omega\; =\; \backslash frac(-1\; +\; i\backslash sqrt\; 3)\; =\; e^$.
The smallest non-_{3} which has 3! = 6 elements.
''S''_{6}, with 720 = 6 ! ^{1}) with nothing but distinct

^{6} is

perfect number
In number theory, a perfect number is a positive integer that is equal to the sum of its positive divisors, excluding the number itself. For instance, 6 has divisors 1, 2 and 3 (excluding itself), and 1 + 2 + 3 = 6, so 6 is a perfect number.
Th ...

.
**The

The Number 6

The Positive Integer 6

{{DEFAULTSORT:6 (Number) Integers 6 (number)

natural number
In mathematics, the natural numbers are those numbers used for counting (as in "there are ''six'' coins on the table") and ordering (as in "this is the ''third'' largest city in the country").
Numbers used for counting are called ''cardinal ...

following 5 and preceding 7. It is a composite number
A composite number is a positive integer that can be formed by multiplying two smaller positive integers. Equivalently, it is a positive integer that has at least one divisor other than 1 and itself. Every positive integer is composite, prime, ...

and the smallest perfect number
In number theory, a perfect number is a positive integer that is equal to the sum of its positive divisors, excluding the number itself. For instance, 6 has divisors 1, 2 and 3 (excluding itself), and 1 + 2 + 3 = 6, so 6 is a perfect number.
Th ...

.
In mathematics

Six is the smallest positive integer which is neither asquare number
In mathematics, a square number or perfect square is an integer that is the square of an integer; in other words, it is the product of some integer with itself. For example, 9 is a square number, since it equals and can be written as .
The usu ...

nor a prime number
A prime number (or a prime) is a natural number greater than 1 that is not a Product (mathematics), product of two smaller natural numbers. A natural number greater than 1 that is not prime is called a composite number. For example, 5 is prime ...

; it is the second smallest composite number
A composite number is a positive integer that can be formed by multiplying two smaller positive integers. Equivalently, it is a positive integer that has at least one divisor other than 1 and itself. Every positive integer is composite, prime, ...

, behind 4; its proper divisor
In mathematics, a divisor of an integer n, also called a factor of n, is an integer m that may be multiplied by some integer to produce n. In this case, one also says that n is a multiple of m. An integer n is divisible or evenly divisible by ...

s are , and .
Since 6 equals the sum of its proper divisors, it is a perfect number
In number theory, a perfect number is a positive integer that is equal to the sum of its positive divisors, excluding the number itself. For instance, 6 has divisors 1, 2 and 3 (excluding itself), and 1 + 2 + 3 = 6, so 6 is a perfect number.
Th ...

; 6 is the smallest of the perfect numbers. It is also the smallest Granville number In mathematics, specifically number theory, Granville numbers, also known as \mathcal-perfect numbers, are an extension of the perfect numbers.
The Granville set
In 1996, Andrew Granville proposed the following construction of a set \mathcal:
: ...

, or $\backslash mathcal$-perfect number.
As a perfect number:
*6 is related to the Mersenne prime
In mathematics, a Mersenne prime is a prime number that is one less than a power of two. That is, it is a prime number of the form for some integer . They are named after Marin Mersenne, a French Minim friar, who studied them in the early 17th ...

3, since . (The next perfect number is 28.)
*6 is the only even perfect number
In number theory, a perfect number is a positive integer that is equal to the sum of its positive divisors, excluding the number itself. For instance, 6 has divisors 1, 2 and 3 (excluding itself), and 1 + 2 + 3 = 6, so 6 is a perfect number.
Th ...

that is not the sum of successive odd cubes.
*6 is the root of the 6-aliquot tree, and is itself the aliquot sum
In number theory, the aliquot sum ''s''(''n'') of a positive integer ''n'' is the sum of all proper divisors of ''n'', that is, all divisors of ''n'' other than ''n'' itself.
That is,
:s(n)=\sum\nolimits_d.
It can be used to characterize the pr ...

of only one other number; the square number
In mathematics, a square number or perfect square is an integer that is the square of an integer; in other words, it is the product of some integer with itself. For example, 9 is a square number, since it equals and can be written as .
The usu ...

, .
Six is the only number that is both the sum and the product of three consecutive positive numbers.
Unrelated to 6's being a perfect number, a Golomb ruler
In mathematics, a Golomb ruler is a set of marks at integer positions along a ruler such that no two pairs of marks are the same distance apart. The number of marks on the ruler is its ''order'', and the largest distance between two of its m ...

of length 6 is a "perfect ruler". Six is a congruent number
In number theory, a congruent number is a positive integer that is the area of a right triangle with three rational number sides. A more general definition includes all positive rational numbers with this property.
The sequence of (integer) cong ...

.
Six is the first discrete biprime (2 × 3) and the first member of the (2 × ''q'') discrete biprime
In mathematics, a semiprime is a natural number that is the product of exactly two prime numbers. The two primes in the product may equal each other, so the semiprimes include the squares of prime numbers.
Because there are infinitely many prime n ...

family.
Six is a unitary perfect number
A unitary perfect number is an integer which is the sum of its positive proper unitary divisors, not including the number itself (a divisor ''d'' of a number ''n'' is a unitary divisor if ''d'' and ''n''/''d'' share no common factors). Some per ...

, a primary pseudoperfect number
In mathematics, and particularly in number theory, ''N'' is a primary pseudoperfect number if it satisfies the Egyptian fraction equation
:\frac + \sum_\frac = 1,
where the sum is over only the prime divisors of ''N''.
Properties
Equivalently, ...

, a harmonic divisor number
In mathematics, a harmonic divisor number, or Ore number (named after Øystein Ore who defined it in 1948), is a positive integer whose divisors have a harmonic mean that is an integer. The first few harmonic divisor numbers are:
: 1, 6, 28, ...

and a superior highly composite number
In mathematics, a superior highly composite number is a natural number which has the highest ratio of its number of divisors to ''some'' positive power of itself than any other number. It is a stronger restriction than that of a highly composite ...

, the last to also be a primorial
In mathematics, and more particularly in number theory, primorial, denoted by "#", is a function from natural numbers to natural numbers similar to the factorial function, but rather than successively multiplying positive integers, the functi ...

.
There are no Graeco-Latin square
In combinatorics, two Latin squares of the same size (''order'') are said to be ''orthogonal'' if when superimposed the ordered paired entries in the positions are all distinct. A set of Latin squares, all of the same order, all pairs of which are ...

s with order 6. If ''n'' is a natural number that is not 2 or 6, then there is a Graeco-Latin square with order ''n''.
There is not a prime $p$ such that the multiplicative order of 2 modulo $p$ is 6, that is, $ord\_p(2)\; =\; 6$
By Zsigmondy's theorem
In number theory, Zsigmondy's theorem, named after Karl Zsigmondy, states that if a>b>0 are coprime integers, then for any integer n \ge 1, there is a prime number ''p'' (called a ''primitive prime divisor'') that divides a^n-b^n and does not divi ...

, if $n$ is a natural number that is not 1 or 6, then there is a prime $p$ such that $ord\_p(2)\; =\; n$. See for such $p$.
The ring of integer of the sixth cyclotomic field , which is called Eisenstein integer
In mathematics, the Eisenstein integers (named after Gotthold Eisenstein), occasionally also known as Eulerian integers (after Leonhard Euler), are the complex numbers of the form
:z = a + b\omega ,
where and are integers and
:\omega = \fr ...

, has 6 units: ±1, ±ω, ±ωabelian group
In mathematics, an abelian group, also called a commutative group, is a group in which the result of applying the group operation to two group elements does not depend on the order in which they are written. That is, the group operation is comm ...

is the symmetric group
In abstract algebra, the symmetric group defined over any set is the group whose elements are all the bijections from the set to itself, and whose group operation is the composition of functions. In particular, the finite symmetric group ...

''S''elements
Element or elements may refer to:
Science
* Chemical element, a pure substance of one type of atom
* Heating element, a device that generates heat by electrical resistance
* Orbital elements, parameters required to identify a specific orbit of o ...

, is the only finite symmetric group which has an outer automorphism In mathematics, the outer automorphism group of a group, , is the quotient, , where is the automorphism group of and ) is the subgroup consisting of inner automorphisms. The outer automorphism group is usually denoted . If is trivial and has ...

. This automorphism allows us to construct a number of exceptional mathematical objects such as the S(5,6,12) Steiner system
250px, thumbnail, The Fano plane is a Steiner triple system S(2,3,7). The blocks are the 7 lines, each containing 3 points. Every pair of points belongs to a unique line.
In combinatorial mathematics, a Steiner system (named after Jakob Steiner) ...

, the projective plane
In mathematics, a projective plane is a geometric structure that extends the concept of a plane. In the ordinary Euclidean plane, two lines typically intersect in a single point, but there are some pairs of lines (namely, parallel lines) that d ...

of order 4 and the Hoffman-Singleton graph. A closely related result is the following theorem: 6 is the only natural number ''n'' for which there is a construction of ''n'' isomorphic
In mathematics, an isomorphism is a structure-preserving mapping between two structures of the same type that can be reversed by an inverse mapping. Two mathematical structures are isomorphic if an isomorphism exists between them. The word i ...

objects on an ''n''-set ''A'', invariant under all permutations of ''A'', but not naturally in one-to-one correspondence with the elements of ''A''. This can also be expressed category theoretically: consider the category
Category, plural categories, may refer to:
Philosophy and general uses
*Categorization, categories in cognitive science, information science and generally
*Category of being
* ''Categories'' (Aristotle)
*Category (Kant)
*Categories (Peirce)
* ...

whose objects are the ''n'' element sets and whose arrows are the bijection
In mathematics, a bijection, also known as a bijective function, one-to-one correspondence, or invertible function, is a function between the elements of two sets, where each element of one set is paired with exactly one element of the other s ...

s between the sets. This category has a non-trivial functor
In mathematics, specifically category theory, a functor is a mapping between categories. Functors were first considered in algebraic topology, where algebraic objects (such as the fundamental group) are associated to topological spaces, and ma ...

to itself only for .
Six similar coins can be arranged around a central coin of the same radius so that each coin makes contact with the central one (and touches both its neighbors without a gap), but seven cannot be so arranged. This makes 6 the answer to the two-dimensional kissing number problem
In geometry, the kissing number of a mathematical space is defined as the greatest number of non-overlapping unit spheres that can be arranged in that space such that they each touch a common unit sphere. For a given sphere packing (arrangement o ...

. The densest sphere packing of the plane is obtained by extending this pattern to the hexagon
In geometry, a hexagon (from Greek , , meaning "six", and , , meaning "corner, angle") is a six-sided polygon. The total of the internal angles of any simple (non-self-intersecting) hexagon is 720°.
Regular hexagon
A '' regular hexagon'' has ...

al lattice in which each circle touches just six others.
6 is the largest of the four all-Harshad numbers.
A six-sided polygon
In geometry, a polygon () is a plane figure that is described by a finite number of straight line segments connected to form a closed '' polygonal chain'' (or ''polygonal circuit''). The bounded plane region, the bounding circuit, or the two t ...

is a hexagon, one of the three regular polygons capable of tiling the plane. Figurate number
The term figurate number is used by different writers for members of different sets of numbers, generalizing from triangular numbers to different shapes (polygonal numbers) and different dimensions (polyhedral numbers). The term can mean
* polygo ...

s representing hexagons (including six) are called hexagonal number
A hexagonal number is a figurate number. The ''n''th hexagonal number ''h'n'' is the number of ''distinct'' dots in a pattern of dots consisting of the ''outlines'' of regular hexagons with sides up to n dots, when the hexagons are overlaid so ...

s. Because 6 is the product of a power of 2 (namely 2Fermat prime
In mathematics, a Fermat number, named after Pierre de Fermat, who first studied them, is a positive integer of the form
:F_ = 2^ + 1,
where ''n'' is a non-negative integer. The first few Fermat numbers are:
: 3, 5, 17, 257, 65537, 429496 ...

s (specifically 3), a regular hexagon is a constructible polygon
In mathematics, a constructible polygon is a regular polygon that can be constructed with compass and straightedge. For example, a regular pentagon is constructible with compass and straightedge while a regular heptagon is not. There are infinit ...

.
Six is also an octahedral number
In number theory, an octahedral number is a figurate number that represents the number of spheres in an octahedron formed from close-packed spheres. The ''n''th octahedral number O_n can be obtained by the formula:.
:O_n=.
The first few octahed ...

. It is a triangular number
A triangular number or triangle number counts objects arranged in an equilateral triangle. Triangular numbers are a type of figurate number, other examples being square numbers and cube numbers. The th triangular number is the number of dots in ...

and so is its square ().
There are six basic trigonometric functions
In mathematics, the trigonometric functions (also called circular functions, angle functions or goniometric functions) are real functions which relate an angle of a right-angled triangle to ratios of two side lengths. They are widely used in all ...

.
There are six convex regular polytopes in four dimensions
In physics and mathematics, the dimension of a mathematical space (or object) is informally defined as the minimum number of coordinates needed to specify any point within it. Thus, a line has a dimension of one (1D) because only one coordin ...

.
The six exponentials theorem
In mathematics, specifically transcendental number theory, the six exponentials theorem is a result that, given the right conditions on the exponents, guarantees the transcendence of at least one of a set of exponentials.
Statement
If ''x''1, '' ...

guarantees (given the right conditions on the exponents) the transcendence of at least one of a set of exponentials.
All primes above 3 are of the form 6''n'' ± 1 for ''n'' ≥ 1.
6 is a pronic number A pronic number is a number that is the product of two consecutive integers, that is, a number of the form n(n+1).. The study of these numbers dates back to Aristotle. They are also called oblong numbers, heteromecic numbers,. or rectangular number ...

and the only semiprime to be.
There are six different ways in which 100 can be expressed as the sum of two prime numbers -- 3 + 97, 11 + 89, 17 + 83, 29 + 71, 41 + 59 and 47 + 53.
List of basic calculations

Greek and Latin word parts

'

' is classicalGreek
Greek may refer to:
Greece
Anything of, from, or related to Greece, a country in Southern Europe:
*Greeks, an ethnic group.
*Greek language, a branch of the Indo-European language family.
**Proto-Greek language, the assumed last common ancestor ...

for "six". Thus:
*"Hexadecimal
In mathematics and computing, the hexadecimal (also base-16 or simply hex) numeral system is a positional numeral system that represents numbers using a radix (base) of 16. Unlike the decimal system representing numbers using 10 symbols, hex ...

" combines ' with the Latinate ' to name a number base
In a positional numeral system, the radix or base is the number of unique digits, including the digit zero, used to represent numbers. For example, for the decimal/denary system (the most common system in use today) the radix (base number) is t ...

of 16
*A hexagon
In geometry, a hexagon (from Greek , , meaning "six", and , , meaning "corner, angle") is a six-sided polygon. The total of the internal angles of any simple (non-self-intersecting) hexagon is 720°.
Regular hexagon
A '' regular hexagon'' has ...

is a regular polygon
In Euclidean geometry, a regular polygon is a polygon that is direct equiangular (all angles are equal in measure) and equilateral (all sides have the same length). Regular polygons may be either convex, star or skew. In the limit, a sequence ...

with six sides
**' is a French nickname for the continental part of Metropolitan France
Metropolitan France (french: France métropolitaine or ''la Métropole''), also known as European France (french: Territoire européen de la France) is the area of France which is geographically in Europe. This collective name for the Europea ...

for its resemblance to a regular hexagon
In geometry, a hexagon (from Greek , , meaning "six", and , , meaning "corner, angle") is a six-sided polygon. The total of the internal angles of any simple (non-self-intersecting) hexagon is 720°.
Regular hexagon
A '' regular hexagon'' has ...

*A hexahedron
A hexahedron (plural: hexahedra or hexahedrons) or sexahedron (plural: sexahedra or sexahedrons) is any polyhedron with six faces. A cube, for example, is a regular hexahedron with all its faces square, and three squares around each vertex.
The ...

is a polyhedron
In geometry, a polyhedron (plural polyhedra or polyhedrons; ) is a three-dimensional shape with flat polygonal faces, straight edges and sharp corners or vertices.
A convex polyhedron is the convex hull of finitely many points, not all on ...

with six faces, with a cube
In geometry, a cube is a three-dimensional solid object bounded by six square faces, facets or sides, with three meeting at each vertex. Viewed from a corner it is a hexagon and its net is usually depicted as a cross.
The cube is the onl ...

being a special case
*Hexameter
Hexameter is a metrical line of verses consisting of six feet (a "foot" here is the pulse, or major accent, of words in an English line of poetry; in Greek and Latin a "foot" is not an accent, but describes various combinations of syllables). It wa ...

is a poetic form consisting of six feet per line
*A "hex nut" is a nut with six sides, and a hex bolt has a six-sided head
*The prefix "" also occurs in the systematic name A systematic name is a name given in a systematic way to one unique group, organism, object or chemical substance, out of a specific population or collection. Systematic names are usually part of a nomenclature.
A semisystematic name or semitrivial ...

of many chemical compound
A chemical compound is a chemical substance composed of many identical molecules (or molecular entities) containing atoms from more than one chemical element held together by chemical bonds. A molecule consisting of atoms of only one element ...

s, such as hexane
Hexane () is an organic compound, a straight-chain alkane with six carbon atoms and has the molecular formula C6H14.
It is a colorless liquid, odorless when pure, and with boiling points approximately . It is widely used as a cheap, relatively ...

which has 6 carbon atoms ().
The prefix ''sex-''

''Sex-'' is aLatin
Latin (, or , ) is a classical language belonging to the Italic languages, Italic branch of the Indo-European languages. Latin was originally a dialect spoken in the lower Tiber area (then known as Latium) around present-day Rome, but through ...

prefix
A prefix is an affix which is placed before the stem of a word. Adding it to the beginning of one word changes it into another word. For example, when the prefix ''un-'' is added to the word ''happy'', it creates the word ''unhappy''. Particula ...

meaning "six". Thus:
*''Senary'' is the ordinal adjective meaning "sixth"
*People with sexdactyly have six fingers on each hand
*The measuring instrument called a sextant
A sextant is a doubly reflecting navigation instrument that measures the angular distance between two visible objects. The primary use of a sextant is to measure the angle between an astronomical object and the horizon for the purposes of cel ...

got its name because its shape forms one-sixth of a whole circle
A circle is a shape consisting of all points in a plane that are at a given distance from a given point, the centre. Equivalently, it is the curve traced out by a point that moves in a plane so that its distance from a given point is con ...

*A group of six musicians is called a sextet
A sextet (or hexad) is a formation containing exactly six members. The former term is commonly associated with vocal ensembles (e.g. The King's Singers, Affabre Concinui) or musical instrument groups, but can be applied to any situation where six ...

*Six babies delivered in one birth are sextuplet
A multiple birth is the culmination of one multiple pregnancy, wherein the mother gives birth to two or more babies. A term most applicable to vertebrate species, multiple births occur in most kinds of mammals, with varying frequencies. Such bir ...

s
*Sexy prime
In number theory, sexy primes are prime numbers that differ from each other by 6. For example, the numbers 5 and 11 are both sexy primes, because both are prime and .
The term "sexy prime" is a pun stemming from the Latin word for six: .
If o ...

pairs – Prime pairs differing by six are ''sexy'', because sex is the Latin word for six.
The SI prefix
The International System of Units, known by the international abbreviation SI in all languages and sometimes pleonastically as the SI system, is the modern form of the metric system and the world's most widely used system of measurement. E ...

for 1000exa-
A metric prefix is a unit prefix that precedes a basic unit of measure to indicate a multiple or submultiple of the unit. All metric prefixes used today are decadic. Each prefix has a unique symbol that is prepended to any unit symbol. The pre ...

(E), and for its reciprocal atto-
A metric prefix is a unit prefix that precedes a basic unit of measure to indicate a multiple or submultiple of the unit. All metric prefixes used today are decadic. Each prefix has a unique symbol that is prepended to any unit symbol. The pre ...

(a).
Evolution of the Arabic digit

The evolution of our modern digit 6 appears rather simple when compared with the other digits. The modern 6 can be traced back to theBrahmi numerals
The Brahmi numerals are a numeral system attested from the 3rd century BCE (somewhat later in the case of most of the tens). They are a non positional decimal system. They are the direct graphic ancestors of the modern Hindu–Arabic numeral ...

of India
India, officially the Republic of India ( Hindi: ), is a country in South Asia. It is the seventh-largest country by area, the second-most populous country, and the most populous democracy in the world. Bounded by the Indian Ocean on the ...

, which are first known from the Edicts of Ashoka
The Edicts of Ashoka are a collection of more than thirty inscriptions on the Pillars of Ashoka, as well as boulders and cave walls, attributed to Emperor Ashoka of the Maurya Empire who reigned from 268 BCE to 232 BCE. Ashoka used the expre ...

circa 250 BCE. It was written in one stroke like a cursive lowercase e rotated 90 degrees clockwise. Gradually, the upper part of the stroke (above the central squiggle) became more curved, while the lower part of the stroke (below the central squiggle) became straighter. The Arabs dropped the part of the stroke below the squiggle. From there, the European evolution to our modern 6 was very straightforward, aside from a flirtation with a glyph that looked more like an uppercase G.
On the seven-segment display
A seven-segment display is a form of electronic display device for displaying decimal numerals that is an alternative to the more complex dot matrix displays.
Seven-segment displays are widely used in digital clocks, electronic meters, basi ...

s of calculators and watches, 6 is usually written with six segments. Some historical calculator models use just five segments for the 6, by omitting the top horizontal bar. This glyph variant has not caught on; for calculators that can display results in hexadecimal, a 6 that looks like a "b" is not practical.
Just as in most modern typeface
A typeface (or font family) is the design of lettering that can include variations in size, weight (e.g. bold), slope (e.g. italic), width (e.g. condensed), and so on. Each of these variations of the typeface is a font.
There are thousands ...

s, in typefaces with text figures
Text figures (also known as non-lining, lowercase, old style, ranging, hanging, medieval, billing, or antique figures or numerals) are numerals designed with varying heights in a fashion that resembles a typical line of running text, hence the ...

the character for the digit 6 usually has an ascender, as, for example, in .
This digit resembles an inverted ''9''. To disambiguate the two on objects and documents that can be inverted, the 6 has often been underlined, both in handwriting and on printed labels.
In music

In artists

*' ("The Six" in English) was a group consisting of the French composers , , , , and in the 1920s * Bands with the number six in their name includeSix Organs of Admittance
Six Organs of Admittance is the primary musical project of American guitarist Ben Chasny. Chasny's music is largely guitar-based and is often considered new folk; however, it includes obvious influences, marked by the use of drones, chimes, and ...

, 6 O'Clock Saints, Electric Six
Electric Six is a six-piece American rock band formed in 1996 in Detroit, Michigan. Their music was described by AllMusic as a combination of garage, disco, punk rock, new wave, and metal. The band achieved recognition in 2003 with the sin ...

, Eve 6
Eve 6 is an American rock band formed in 1995 in Southern California, best known for their hit singles " Inside Out," "Leech," " Here's to the Night," and "Promise." They disbanded in 2004, returned for numerous tours in 2007 with a new lineu ...

, Los Xey (' is Basque for "six"), Out On Blue Six, Six In Six, Sixpence None the Richer
Sixpence None the Richer (also known as Sixpence) is an American Christian alternative rock band that formed in New Braunfels, Texas, and eventually settled in Nashville, Tennessee. They are best known for their songs " Kiss Me" and " Breathe Yo ...

, Slant 6
Slant 6 was an American punk rock trio based in Washington, D.C. affiliated with early riot grrrl.
Slant 6 consisted of Christina Billotte (electric guitar and vocals), Myra Power (electric bass guitar and vocals), and Marge Marshall (drum se ...

, Vanity 6, and You Me At Six
You Me at Six are an English rock band from Weybridge, Surrey. The band consists of lead singer Josh Franceschi, guitarists Max Helyer and Chris Miller, bassist Matt Barnes and drummer Daniel Flint. Formed in 2004, the name for the group ori ...

* #6 is the pseudonym of American musician Shawn Crahan
Michael Shawn Crahan (born September 24, 1969), more commonly known by his stage persona "Clown", is an American musician. He is the co-founder and one of two percussionists for heavy metal band Slipknot in which he is designated #6. Crahan he ...

, when performing with the band Slipknot
In instruments

*A standardguitar
The guitar is a fretted musical instrument that typically has six strings. It is usually held flat against the player's body and played by strumming or plucking the strings with the dominant hand, while simultaneously pressing selected stri ...

has six strings
*Most woodwind
Woodwind instruments are a family of musical instruments within the greater category of wind instruments. Common examples include flute, clarinet, oboe, bassoon, and saxophone. There are two main types of woodwind instruments: flutes and re ...

instruments have six basic holes or keys (e.g., bassoon, clarinet, pennywhistle, saxophone); these holes or keys are usually not given numbers or letters in the fingering charts
In music theory

*There are six whole tones in an octave. *There are six semitones in a tritone.In works

*"Six geese a-laying" were given as a present on the sixth day in the popularChristmas carol
A Christmas carol is a carol (a song or hymn) on the theme of Christmas, traditionally sung at Christmas itself or during the surrounding Christmas holiday season. The term noel has sometimes been used, especially for carols of French o ...

, " The Twelve Days of Christmas."
*Divided in six arias, '' Hexachordum Apollinis'' is generally regarded as one of the pinnacles of Johann Pachelbel
Johann Pachelbel (baptised – buried 9 March 1706; also Bachelbel) was a German composer, organist, and teacher who brought the south German organ schools to their peak. He composed a large body of sacred and secular music, and his contrib ...

's oeuvre.
*The theme of the sixth album by Dream Theater, '' Six Degrees of Inner Turbulence'', was the number six: the album has six songs, and the sixth song — that is, the complete second disc — explores the stories of six individuals suffering from various mental illnesses.
*Aristotle
Aristotle (; grc-gre, Ἀριστοτέλης ''Aristotélēs'', ; 384–322 BC) was a Greek philosopher and polymath during the Classical period in Ancient Greece. Taught by Plato, he was the founder of the Peripatetic school of ...

gave six elements of tragedy, the first of which is Mythos.
In religion

*In Judaism: **Six points on aStar of David
The Star of David (). is a generally recognized symbol of both Jewish identity and Judaism. Its shape is that of a hexagram: the compound of two equilateral triangles.
A derivation of the '' seal of Solomon'', which was used for decorati ...

**Six orders of the Mishnah
The Mishnah or the Mishna (; he, מִשְׁנָה, "study by repetition", from the verb ''shanah'' , or "to study and review", also "secondary") is the first major written collection of the Jewish oral traditions which is known as the Oral Torah ...

**Six symbolic foods placed on the Passover Seder Plate
The Passover Seder plate ( he, קערה, ''ke'ara'') is a special plate containing symbolic foods eaten or displayed at the Passover Seder. The purpose of the Passover Seder plate is to show all the foods that perpetuate and emphasize the ideas ...

**God
In monotheistic thought, God is usually viewed as the supreme being, creator, and principal object of faith. Swinburne, R.G. "God" in Honderich, Ted. (ed)''The Oxford Companion to Philosophy'', Oxford University Press, 1995. God is typically ...

took six days to create the world in the Old Testament
The Old Testament (often abbreviated OT) is the first division of the Christian biblical canon, which is based primarily upon the 24 books of the Hebrew Bible or Tanakh, a collection of ancient religious Hebrew writings by the Israelites. T ...

Book of Genesis
The Book of Genesis (from Greek ; Hebrew: בְּרֵאשִׁית ''Bəreʾšīt'', "In hebeginning") is the first book of the Hebrew Bible and the Christian Old Testament. Its Hebrew name is the same as its first word, ( "In the beginning") ...

; humankind was created on day 6. In the ''City of God'', Augustine of Hippo
Augustine of Hippo ( , ; la, Aurelius Augustinus Hipponensis; 13 November 354 – 28 August 430), also known as Saint Augustine, was a theologian and philosopher of Berber origin and the bishop of Hippo Regius in Numidia, Roman North Afr ...

suggested (book 11, chapter 30) that God's creation of the world took six days because 6 is a Jewish
Jews ( he, יְהוּדִים, , ) or Jewish people are an ethnoreligious group and nation originating from the Israelites Israelite origins and kingdom: "The first act in the long drama of Jewish history is the age of the Israelites""T ...

holiday of Shavuot
(''Ḥag HaShavuot'' or ''Shavuos'')
, nickname = English: "Feast of Weeks"
, observedby = Jews and Samaritans
, type = Jewish and Samaritan
, begins = 6th day of Sivan (or the Sunday following the 6th day of Sivan in ...

starts on the sixth day of the Hebrew
Hebrew (; ; ) is a Northwest Semitic language of the Afroasiatic language family. Historically, it is one of the spoken languages of the Israelites and their longest-surviving descendants, the Jews and Samaritans. It was largely preserved ...

month of Sivan
''Sivan'' (Hebrew: סִיוָן, Standard ''Sīvan'', Tiberian ''Sīwān''; from Akkadian ''simānu'', meaning "Season; time") is the ninth month of the civil year and the third month of the ecclesiastical year on the Hebrew calendar. It is a ...

**Seraph
A seraph (, "burning one"; plural seraphim ) is a type of celestial or heavenly being originating in Ancient Judaism. The term plays a role in subsequent Judaism, Christianity, and Islam.
Tradition places seraphim in the highest rank in Chr ...

s have six wings.
*In Islam:
**There are Six articles of belief
Iman ( ''ʾīmān'', lit. faith or belief) in Islamic theology denotes a believer's faith in the metaphysical aspects of Islam.Farāhī, Majmū‘ah Tafāsīr, 2nd ed. (Faran Foundation, 1998), 347. Its most simple definition is the belief i ...

**Fasting six days of Shawwal
Shawwal ( ar, شَوَّال, ') is the tenth month of the lunar based Islamic calendar. ''Shawwāl'' stems from the verb ''shāla'' () which means to 'lift or carry', generally to take or move things from one place to another,
Fasting during ...

, together with the month of Ramadan
, type = islam
, longtype = Religious
, image = Ramadan montage.jpg
, caption=From top, left to right: A crescent moon over Sarıçam, Turkey, marking the beginning of the Islamic month of Ramadan. Ramadan Quran reading in Bandar Torkaman, Iran. ...

, is equivalent to fasting the whole year
*In Hindu theology, a '' trasarenu'' is the combination of six celestial (atoms
Every atom is composed of a nucleus and one or more electrons bound to the nucleus. The nucleus is made of one or more protons and a number of neutrons. Only the most common variety of hydrogen has no neutrons.
Every solid, liquid, gas, and ...

).
*In Taoism:
**Six Lines of a Hexagram
, can be seen as a compound composed of an upwards (blue here) and downwards (pink) facing equilateral triangle, with their intersection as a regular hexagon (in green).
A hexagram ( Greek language, Greek) or sexagram (Latin) is a six-pointed ...

**Six Ministries
The Three Departments and Six Ministries () system was the primary administrative structure in imperial China from the Sui dynasty (581–618) to the Yuan dynasty (1271–1368). It was also used by Balhae (698–926) and Goryeo (918–1392) and ...

of Huang Di Huangdi () may refer to:
* Yellow Emperor (黃帝), a legendary Chinese monarch who supposedly ruled before the Xia dynasty
*Emperor of China (皇帝), the imperial title of Chinese monarchs; and the superlative monarchical title in the Sinosphere
...

In science

Astronomy

*Messier object
The Messier objects are a set of 110 astronomical objects catalogued by the French astronomer Charles Messier in his ''Catalogue des Nébuleuses et des Amas d'Étoiles'' (''Catalogue of Nebulae and Star Clusters'').
Because Messier was only in ...

M6, a magnitude 4.5 open cluster
An open cluster is a type of star cluster made of up to a few thousand stars that were formed from the same giant molecular cloud and have roughly the same age. More than 1,100 open clusters have been discovered within the Milky Way galaxy, and ...

in the constellation Scorpius
Scorpius is a zodiac constellation located in the Southern celestial hemisphere, where it sits near the center of the Milky Way, between Libra to the west and Sagittarius to the east. Scorpius is an ancient constellation that pre-dates the G ...

, also known as the Butterfly Cluster
The Butterfly Cluster (cataloged as Messier 6 or M6, and as NGC 6405) is an open cluster of stars in the southern constellation of Scorpius. Its name derives from the vague resemblance of its shape to a butterfly. The Trumpler classification of ...

*The New General Catalogue
The ''New General Catalogue of Nebulae and Clusters of Stars'' (abbreviated NGC) is an astronomical catalogue of deep-sky objects compiled by John Louis Emil Dreyer in 1888. The NGC contains 7,840 objects, including galaxies, star clusters a ...

br>objectNGC 6
NGC commonly refers to:
* New General Catalogue of Nebulae and Clusters of Stars, a catalogue of deep sky objects in astronomy
NGC may also refer to:
Companies
* NGC Corporation, name of US electric company Dynegy, Inc. from 1995 to 1998
* Nat ...

, a spiral galaxy
Spiral galaxies form a class of galaxy originally described by Edwin Hubble in his 1936 work ''The Realm of the Nebulae''constellation
A constellation is an area on the celestial sphere in which a group of visible stars forms a perceived pattern or outline, typically representing an animal, mythological subject, or inanimate object.
The origins of the earliest constellation ...

Andromeda
*The Roman numeral VI:
**Stands for subdwarf
A subdwarf, sometimes denoted by "sd", is a star with luminosity class VI under the Yerkes spectral classification system. They are defined as stars with luminosity 1.5 to 2 magnitudes lower than that of main-sequence stars of the same spectral ...

s in the Yerkes spectral classification scheme
**(Usually) stands for the sixth-discovered satellite of a planet or minor planet (e.g. Jupiter VI
Himalia (), or Jupiter VI, is the largest irregular satellite of Jupiter, with a diameter of at least . It is the sixth largest Jovian satellite, after the four Galilean moons and Amalthea. It was discovered by Charles Dillon Perrine at the ...

)
*6 Hebe
Hebe ( minor planet designation: 6 Hebe) is a large main-belt asteroid, containing around 0.5% of the mass of the belt. However, due to its apparently high bulk density (greater than that of the Moon or even Mars), Hebe does not rank among the ...

Biology

*The cells of abeehive
A beehive is an enclosed structure in which some honey bee species of the subgenus '' Apis'' live and raise their young. Though the word ''beehive'' is commonly used to describe the nest of any bee colony, scientific and professional literature ...

are six-sided.
*Insects
Insects (from Latin ') are pancrustacean hexapod invertebrates of the class Insecta. They are the largest group within the arthropod phylum. Insects have a chitinous exoskeleton, a three-part body (head, thorax and abdomen), three pairs of ...

have six leg
A leg is a weight-bearing and locomotive anatomical structure, usually having a columnar shape. During locomotion, legs function as "extensible struts". The combination of movements at all joints can be modeled as a single, linear element c ...

s.
*Six kingdoms in the taxonomic rank
In biological classification, taxonomic rank is the relative level of a group of organisms (a taxon) in an ancestral or hereditary hierarchy. A common system consists of species, genus, family, order, class, phylum, kingdom, domain. Whi ...

below domain (biology)
In biological taxonomy, a domain ( or ) (Latin: ''regio''), also dominion, superkingdom, realm, or empire, is the highest taxonomic rank of all organisms taken together. It was introduced in the three-domain system of taxonomy devised by Carl Wo ...

; Animalia
Animals are multicellular, eukaryotic organisms in the biological kingdom Animalia. With few exceptions, animals consume organic material, breathe oxygen, are able to move, can reproduce sexually, and go through an ontogenetic stage i ...

, Plantae
Plants are predominantly photosynthetic eukaryotes of the kingdom Plantae. Historically, the plant kingdom encompassed all living things that were not animals, and included algae and fungi; however, all current definitions of Plantae exclude ...

, Fungi
A fungus ( : fungi or funguses) is any member of the group of eukaryotic organisms that includes microorganisms such as yeasts and molds, as well as the more familiar mushrooms. These organisms are classified as a kingdom, separately from ...

, Protista
A protist () is any eukaryotic organism (that is, an organism whose cells contain a cell nucleus) that is not an animal, plant, or fungus. While it is likely that protists share a common ancestor (the last eukaryotic common ancestor), the exclu ...

, Archaea
Archaea ( ; singular archaeon ) is a domain of single-celled organisms. These microorganisms lack cell nuclei and are therefore prokaryotes. Archaea were initially classified as bacteria, receiving the name archaebacteria (in the Archae ...

/ Archaeabacteria, and Bacteria/Eubacteria
Bacteria (; singular: bacterium) are ubiquitous, mostly free-living organisms often consisting of one biological cell. They constitute a large domain of prokaryotic microorganisms. Typically a few micrometres in length, bacteria were among ...

. See Kingdom (biology)
In biology, a kingdom is the second highest taxonomic rank, just below domain. Kingdoms are divided into smaller groups called phyla.
Traditionally, some textbooks from the United States and Canada used a system of six kingdoms (Animalia, Plan ...

.
*The six elements most common in biomolecules are called the CHNOPS elements; the letters stand for the chemical abbreviations of carbon
Carbon () is a chemical element with the symbol C and atomic number 6. It is nonmetallic and tetravalent—its atom making four electrons available to form covalent chemical bonds. It belongs to group 14 of the periodic table. Carbon makes u ...

, hydrogen
Hydrogen is the chemical element with the symbol H and atomic number 1. Hydrogen is the lightest element. At standard conditions hydrogen is a gas of diatomic molecules having the formula . It is colorless, odorless, tasteless, non-toxi ...

, nitrogen
Nitrogen is the chemical element with the symbol N and atomic number 7. Nitrogen is a nonmetal and the lightest member of group 15 of the periodic table, often called the pnictogens. It is a common element in the universe, estimated at sevent ...

, oxygen
Oxygen is the chemical element with the symbol O and atomic number 8. It is a member of the chalcogen group in the periodic table, a highly reactive nonmetal, and an oxidizing agent that readily forms oxides with most elements as ...

, phosphorus
Phosphorus is a chemical element with the symbol P and atomic number 15. Elemental phosphorus exists in two major forms, white phosphorus and red phosphorus, but because it is highly reactive, phosphorus is never found as a free element on Ea ...

, and sulfur
Sulfur (or sulphur in British English) is a chemical element with the symbol S and atomic number 16. It is abundant, multivalent and nonmetallic. Under normal conditions, sulfur atoms form cyclic octatomic molecules with a chemical formul ...

. See CHON
CHON is a mnemonic acronym for the four most common elements in living organisms: carbon, hydrogen, oxygen, and nitrogen.
The acronym CHNOPS, which stands for ''c''arbon, ''h''ydrogen, ''n''itrogen, ''o''xygen, ''p''hosphorus, ''s''ulfu ...

.
Chemistry

*A benzene molecule has a ring of six carbon atoms. *6 is theatomic number
The atomic number or nuclear charge number (symbol ''Z'') of a chemical element is the charge number of an atomic nucleus. For ordinary nuclei, this is equal to the proton number (''n''p) or the number of protons found in the nucleus of ever ...

of carbon.
*The sixfold symmetry
Symmetry (from grc, συμμετρία "agreement in dimensions, due proportion, arrangement") in everyday language refers to a sense of harmonious and beautiful proportion and balance. In mathematics, "symmetry" has a more precise definiti ...

of snowflake
A snowflake is a single ice crystal that has achieved a sufficient size, and may have amalgamated with others, which falls through the Earth's atmosphere as snow.Knight, C.; Knight, N. (1973). Snow crystals. Scientific American, vol. 228, n ...

s arises from the hexagon
In geometry, a hexagon (from Greek , , meaning "six", and , , meaning "corner, angle") is a six-sided polygon. The total of the internal angles of any simple (non-self-intersecting) hexagon is 720°.
Regular hexagon
A '' regular hexagon'' has ...

al crystal structure of ordinary ice.
*A hexamer
In chemistry and biochemistry, an oligomer () is a molecule that consists of a few repeating units which could be derived, actually or conceptually, from smaller molecules, monomers.Quote: ''Oligomer molecule: A molecule of intermediate relativ ...

is an oligomer made of six subunits.
Medicine

*There are six tastes in traditional Indian medicine (Ayurveda
Ayurveda () is an alternative medicine system with historical roots in the Indian subcontinent. The theory and practice of Ayurveda is pseudoscientific. Ayurveda is heavily practiced in India and Nepal, where around 80% of the population repo ...

): sweet, sour, salty, bitter, pungent, and astringent. These tastes are used to suggest a diet based on the symptoms of the body.
*Phase 6 is one of six pandemic influenza phases.
Physics

*In the Standard Model of particle physics, there are six types ofquarks
A quark () is a type of elementary particle and a fundamental constituent of matter. Quarks combine to form composite particles called hadrons, the most stable of which are protons and neutrons, the components of atomic nuclei. All commonly o ...

and six types of leptons.
*In statistical mechanics
In physics, statistical mechanics is a mathematical framework that applies statistical methods and probability theory to large assemblies of microscopic entities. It does not assume or postulate any natural laws, but explains the macroscopic be ...

, the six-vertex model In statistical mechanics, the ice-type models or six-vertex models are a family of vertex models for crystal lattices with hydrogen bonds. The first such model was introduced by Linus Pauling in 1935 to account for the residual entropy of water ice ...

has six possible configurations of arrows at each vertex
*There are six colors in the RGB color wheel: (primary) red, blue, green, (secondary) cyan, magenta, and yellow. (See Tertiary color
A tertiary color or intermediate color is a color made by mixing full saturation of one primary color with half saturation of another primary color and none of a third primary color, in a given color space such as RGB, CMYK (more modern) or RYB ...

)
*In three-dimensional
Three-dimensional space (also: 3D space, 3-space or, rarely, tri-dimensional space) is a geometric setting in which three values (called ''parameters'') are required to determine the position of an element (i.e., point). This is the informal ...

Euclidean space
Euclidean space is the fundamental space of geometry, intended to represent physical space. Originally, that is, in Euclid's ''Elements'', it was the three-dimensional space of Euclidean geometry, but in modern mathematics there are Euclidean ...

, there are six unknown support reactions for a statically determinate
In statics and structural mechanics, a structure is statically indeterminate when the static equilibrium equations force and moment equilibrium conditions are insufficient for determining the internal forces and reactions on that structure.
M ...

structure: one force
In physics, a force is an influence that can change the motion of an object. A force can cause an object with mass to change its velocity (e.g. moving from a state of rest), i.e., to accelerate. Force can also be described intuitively as a ...

in each of the three dimensions, and one moment through each of three possible orthogonal
In mathematics, orthogonality is the generalization of the geometric notion of ''perpendicularity''.
By extension, orthogonality is also used to refer to the separation of specific features of a system. The term also has specialized meanings in ...

planes.
In sports

* TheOriginal Six
The Original Six () are the teams that comprised the National Hockey League (NHL) between 1942 and 1967. The six teams are the Boston Bruins, Chicago Black Hawks, Detroit Red Wings, Montreal Canadiens, New York Rangers, and Toronto Maple Lea ...

teams in the National Hockey League are Toronto
Toronto ( ; or ) is the capital city of the Canadian province of Ontario. With a recorded population of 2,794,356 in 2021, it is the most populous city in Canada and the fourth most populous city in North America. The city is the anc ...

, Chicago
(''City in a Garden''); I Will
, image_map =
, map_caption = Interactive Map of Chicago
, coordinates =
, coordinates_footnotes =
, subdivision_type = Country
, subdivision_name ...

, Montreal
Montreal ( ; officially Montréal, ) is the second-most populous city in Canada and most populous city in the Canadian province of Quebec. Founded in 1642 as '' Ville-Marie'', or "City of Mary", it is named after Mount Royal, the triple- ...

, New York
New York most commonly refers to:
* New York City, the most populous city in the United States, located in the state of New York
* New York (state), a state in the northeastern United States
New York may also refer to:
Film and television
* ...

, Boston
Boston (), officially the City of Boston, is the state capital and most populous city of the Commonwealth of Massachusetts, as well as the cultural and financial center of the New England region of the United States. It is the 24th- m ...

, and Detroit
Detroit ( , ; , ) is the largest city in the U.S. state of Michigan. It is also the largest U.S. city on the United States–Canada border, and the seat of government of Wayne County. The City of Detroit had a population of 639,111 at ...

. They are the oldest remaining teams in the league, though not necessarily the first six; they comprised the entire league from 1942
Events
Below, the events of World War II have the "WWII" prefix.
January
* January 1 – WWII: The Declaration by United Nations is signed by China, the United Kingdom, the United States, the Soviet Union, and 22 other nations, in ...

to 1967
Events
January
* January 1 – Canada begins a year-long celebration of the 100th anniversary of Confederation, featuring the Expo 67 World's Fair.
* January 5
** Spain and Romania sign an agreement in Paris, establishing full consular and ...

.
* Number of players:
** In association football
Association football, more commonly known as football or soccer, is a team sport played between two teams of 11 Football player, players who primarily use their feet to propel the Ball (association football), ball around a rectangular field ca ...

(soccer), the number of substitutes combined by both teams, that are allowed in the game.
** In box lacrosse
Box lacrosse, also known as boxla, box, or indoor lacrosse, is an indoor version of lacrosse played mostly in North America. The game originated in Canada in the 1930s, where it is more popular than field lacrosse. Lacrosse is Canada's officia ...

, the number of players per team, including the goaltender, that are on the floor at any one time, excluding penalty situations.
** In ice hockey
Ice hockey (or simply hockey) is a team sport played on ice skates, usually on an ice skating rink with lines and markings specific to the sport. It belongs to a family of sports called hockey. In ice hockey, two opposing teams use ice h ...

, the number of players per team, including the goaltender, that are on the ice at any one time during regulation play, excluding penalty situations. (Some leagues reduce the number of players on the ice during overtime.)
** In volleyball
Volleyball is a team sport in which two teams of six players are separated by a net. Each team tries to score points by grounding a ball on the other team's court under organized rules. It has been a part of the official program of the Summ ...

:
*** Six players from each team on each side play against each other.
*** Standard rules only allow six total substitutions per team per set. (Substitutions involving the libero, a defensive specialist who can only play in the back row, are not counted against this limit.)
** Six-man football
Six-man football is a variant of gridiron football played with six players per team, instead of the standard 11 or 12. It is generally played by high schools in rural areas of the United States and Canada.
History
Six-man football was developed ...

is a variant of American or Canadian football, played by smaller schools with insufficient enrollment to field the traditional 11-man (American) or 12-man (Canadian) squad.
* Scoring:
** In both American and Canadian football
Canadian football () is a sport played in Canada in which two teams of 12 players each compete for territorial control of a field of play long and wide attempting to advance a pointed oval-shaped ball into the opposing team's scoring area ...

, 6 points are awarded for a touchdown.
** In Australian rules football
Australian football, also called Australian rules football or Aussie rules, or more simply football or footy, is a contact sport played between two teams of 18 players on an oval field, often a modified cricket ground. Points are scored by ...

, 6 points are awarded for a goal, scored when a kicked ball passes between the defending team's two inner goalposts without having been touched by another player.
** In cricket
Cricket is a bat-and-ball game played between two teams of eleven players on a field at the centre of which is a pitch with a wicket at each end, each comprising two bails balanced on three stumps. The batting side scores runs by s ...

, six runs are scored for the batting team when the ball is hit to the boundary or the ground beyond it without having touched the ground in the field.
* In basketball
Basketball is a team sport in which two teams, most commonly of five players each, opposing one another on a rectangular Basketball court, court, compete with the primary objective of #Shooting, shooting a basketball (ball), basketball (appr ...

, the ball
A ball is a round object (usually spherical, but can sometimes be ovoid) with several uses. It is used in ball games, where the play of the game follows the state of the ball as it is hit, kicked or thrown by players. Balls can also be used fo ...

used for women's full-court competitions is designated "size 6".
* In most rugby league
Rugby league football, commonly known as just rugby league and sometimes football, footy, rugby or league, is a full-contact sport played by two teams of thirteen players on a rectangular field measuring 68 metres (75 yards) wide and 11 ...

competitions (but not the Super League
The Super League (officially known as the Betfred Super League due to sponsorship from Betfred and legally known as Super League Europe), is the top-level of the British rugby league system. At present the league consists of twelve teams, of w ...

, which uses static squad numbering), the jersey number 6 is worn by the starting (Southern Hemisphere term) or (Northern Hemisphere term).
* In rugby union
Rugby union, commonly known simply as rugby, is a Contact sport#Terminology, close-contact team sport that originated at Rugby School in the first half of the 19th century. One of the Comparison of rugby league and rugby union, two codes of ru ...

, the starting blindside flanker wears jersey number 6. (Some teams use "left" and "right" flankers instead of "openside" and "blindside", with 6 being worn by the starting left flanker.)
In technology

*On most phones, the 6 key is associated with the letters M, N, and O, but on the BlackBerry Pearl it is the key for J and K, and on the BlackBerry 8700 series and Curve 8900 with full keyboard, it is the key for F *The " 6-meter band" inamateur radio
Amateur radio, also known as ham radio, is the use of the radio frequency spectrum for purposes of non-commercial exchange of messages, wireless experimentation, self-training, private recreation, radiosport, contesting, and emergency comm ...

includes the frequencies from 50 to 54 MHz
*6 is the resin identification code
The ASTM International Resin Identification Coding System, often abbreviated RIC, is a set of symbols appearing on plastic products that identify the plastic resin out of which the product is made. It was developed in 1988 by the Society of ...

used in recycling to identify polystyrene
Polystyrene (PS) is a synthetic polymer made from monomers of the aromatic hydrocarbon styrene. Polystyrene can be solid or foamed. General-purpose polystyrene is clear, hard, and brittle. It is an inexpensive resin per unit weight. It is ...

In calendars

*In the ancientRoman calendar
The Roman calendar was the calendar used by the Roman Kingdom and Roman Republic. The term often includes the Julian calendar established by the reforms of the dictator Julius Caesar and emperor Augustus in the late 1stcenturyBC and sometime ...

, Sextilis
Sextilis ("sixth") or ''mensis Sextilis'' was the Latin name for what was originally the sixth month in the Roman calendar, when March ('' Martius'', "Mars' month") was the first of ten months in the year. After the calendar reform that produced ...

was the sixth month. After the Julian reform, June
June is the sixth month of the year in the Julian and Gregorian calendars and is the second of four months to have a length of 30 days, and the third of five months to have a length of less than 31 days. June contains the summer solstice in ...

became the sixth month and Sextilis was renamed August
*Sextidi was the sixth day of the '' décade'' in the French Revolutionary calendar
In the arts and entertainment

Games

*The number of sides on a cube, hence the highest number on a standard die *The six-sided tiles on a hex grid are used in many tabletop andboard games
Board games are tabletop games that typically use . These pieces are moved or placed on a pre-marked board (playing surface) and often include elements of table, card, role-playing, and miniatures games as well.
Many board games feature a c ...

.
*The highest number on one end of a standard domino
Dominoes is a family of tile-based games played with gaming pieces, commonly known as dominoes. Each domino is a rectangular tile, usually with a line dividing its face into two square ''ends''. Each end is marked with a number of spots (also ca ...

Comics and cartoons

*'' The Super 6'', a 1966 animated cartoon series featuring six different super-powered heroes.Literature

*''The Power of Six
''The Power of Six'' is the second book in the young adult science fiction series ''Lorien Legacies'', written by Pittacus Lore (James Frey and Jobie Hughes). It is the sequel to '' I Am Number Four'', and was released August 23, 2011 by HarperC ...

'' is a book written by Pittacus Lore, and the second in the Lorien Legacies
''Lorien Legacies'' is a series of young adult science fiction books, written by James Frey, Jobie Hughes, and formerly, Greg Boose, under the collective pseudonym Pittacus Lore.
Lorien Legacies
''I am Number Four''
The first book of The ...

series.
*Number 6 is a character in the book series Lorien Legacies
''Lorien Legacies'' is a series of young adult science fiction books, written by James Frey, Jobie Hughes, and formerly, Greg Boose, under the collective pseudonym Pittacus Lore.
Lorien Legacies
''I am Number Four''
The first book of The ...

TV

* Number Six (Tricia Helfer
Tricia Janine Helfer (born April 11, 1974) is a Canadian-American actress and former model. She played the enigmatic Cylon model Number Six in the re-imagined ''Battlestar Galactica'' series (2004–2009). She also voiced Sarah Kerrigan in '' ...

), is a family of fictional characters from the reimagined science fiction television series, ''Battlestar Galactica
''Battlestar Galactica'' is an American science fiction media franchise created by Glen A. Larson. The franchise began with the original television series in 1978, and was followed by a short-run sequel series ('' Galactica 1980''), a line of ...

''
*Number 6, the main protagonist in ''The Prisoner
''The Prisoner'' is a 1967 British television series about an unnamed British intelligence agent who is abducted and imprisoned in a mysterious coastal village, where his captors designate him as Number Six and try to find out why he abruptl ...

'' played by Patrick McGoohan
Patrick Joseph McGoohan (; March 19, 1928 – January 13, 2009) was an Irish-American actor, director, screenwriter, and producer of film and television.
Born in the United States to Irish emigrant parents, he was raised in Ireland and Engla ...

, and portrayed by Jim Caviezel
James Patrick Caviezel Jr. (; born September 26, 1968) is an American film and television actor who played Jesus Christ in ''The Passion of the Christ'' (2004) and starred as John Reese on the CBS series ''Person of Interest'' (2011–2016). He ...

in the remake.
*Six is a character in the television series ''Blossom
In botany, blossoms are the flowers of stone fruit trees (genus '' Prunus'') and of some other plants with a similar appearance that flower profusely for a period of time in spring.
Colloquially, flowers of orange are referred to as such ...

'' played by Jenna von Oÿ.
*Six is the nickname of Kal Varrik, a central character in the television series ''Dark Matter
Dark matter is a hypothetical form of matter thought to account for approximately 85% of the matter in the universe. Dark matter is called "dark" because it does not appear to interact with the electromagnetic field, which means it does not a ...

'', played by Roger Cross
Roger Cross (born October 19, 1969) is a Jamaican-born Canadian actor who has made numerous appearances in several films and television series, mostly on productions shot in Canada. He is known for his work as CTU Agent Curtis Manning in the ...

.
*'' Six'' is a History
History (derived ) is the systematic study and the documentation of the human activity. The time period of event before the invention of writing systems is considered prehistory. "History" is an umbrella term comprising past events as we ...

channel series that chronicles the operations and daily lives of SEAL Team Six.
*'' Six Feet Under'', an HBO
Home Box Office (HBO) is an American pay television, premium television network, which is the flagship property of namesake parent subsidiary Home Box Office, Inc., itself a unit owned by Warner Bros. Discovery. The overall Home Box Office busi ...

series that ran from 2005 to 2011.
Movies

*Number 6 (Teresa Palmer
Teresa Mary Palmer (born 26 February 1986) is an Australian actress. She began her career with roles in '' Bedtime Stories'' (2008), ''The Sorcerer's Apprentice'' (2010), '' Take Me Home Tonight'' (2011), and '' I Am Number Four'' (2011). She r ...

) is a character in the movie '' I Am Number Four'' (2011).
*''The 6th Day
''The 6th Day'' is a 2000 American science fiction action film directed by Roger Spottiswoode and starring Arnold Schwarzenegger, Tony Goldwyn, Michael Rapaport, and Robert Duvall. In the film, a family man of the future is illegally cloned by ...

'' (2000), starring Arnold Schwarzenegger
Arnold Alois Schwarzenegger (born July 30, 1947) is an Austrian and American actor, film producer, businessman, retired professional bodybuilder and politician who served as the 38th governor of California between 2003 and 2011. ''Time'' ...

.
*''The Sixth Sense
''The Sixth Sense'' is a 1999 American psychological thriller film written and directed by M. Night Shyamalan. It stars Bruce Willis as a child psychologist whose patient (Haley Joel Osment) claims he can see and talk to the dead.
Released b ...

'' (1999), written and directed by M. Night Shyamalan
Manoj Nelliyattu M. Night Shyamalan ( ; born August 6, 1970) is an Indian-American filmmaker and actor. He is best known for making original films with contemporary supernatural plots and twist endings. He was born in Mahé, India, and raise ...

and starring Haley Joel Osment
Haley Joel Osment (born April 10, 1988) is an American actor and voice actor. Beginning his career as a child actor, Osment's role in the comedy-drama film '' Forrest Gump'' (1994) won him a Young Artist Award. His breakthrough came with the p ...

and Bruce Willis
Walter Bruce Willis (born March 19, 1955) is a retired American actor. He achieved fame with a leading role on the comedy-drama series '' Moonlighting'' (1985–1989) and appeared in over a hundred films, gaining recognition as an action hero ...

.
*''Girl 6
''Girl 6'' is a 1996 American black comedy film produced and directed by Spike Lee. The film stars Theresa Randle, Isaiah Washington, and Lee. Suzan-Lori Parks wrote the screenplay, making it the first film directed by Lee in which he did not wri ...

'' (1996), directed by Spike Lee
Shelton Jackson "Spike" Lee (born March 20, 1957) is an American film director, producer, screenwriter, and actor. His production company, 40 Acres and a Mule Filmworks, has produced more than 35 films since 1983. He made his directorial debut ...

.
Musicals

* ''Six'' is a modern retelling of the lives of the six wives ofHenry VIII
Henry VIII (28 June 149128 January 1547) was King of England from 22 April 1509 until his death in 1547. Henry is best known for his six marriages, and for his efforts to have his first marriage (to Catherine of Aragon) annulled. His disagr ...

presented as a pop concert.
Anthropology

*The name of the smallest group ofCub Scout
Cub Scouts, Cubs or Wolf Cubs are programs associated with Scouting for young children usually between 7 and 12, depending on the organization to which they belong. A participant in the program is called a Cub. A group of Cubs is called a 'P ...

s and Guiding's equivalent Brownies, traditionally consisting of six people and is led by a "sixer".
*A coffin
A coffin is a funerary box used for viewing or keeping a corpse, either for burial or cremation.
Sometimes referred to as a casket, any box in which the dead are buried is a coffin, and while a casket was originally regarded as a box for jewe ...

is traditionally buried six feet under the ground; thus, the phrase "six feet under" means that a person (or thing, or concept) is dead
*There are said to be no more than six degrees of separation
Six degrees of separation is the idea that all people are six or fewer social connections away from each other. As a result, a chain of " friend of a friend" statements can be made to connect any two people in a maximum of six steps. It is also ...

between any two people on Earth.
*In Western astrology, Virgo
Virgo may refer to:
*Virgo (astrology), the sixth astrological sign of the zodiac
*Virgo (constellation), a constellation
*Virgo Cluster, a cluster of galaxies in the constellation Virgo
* Virgo Stellar Stream, remains of a dwarf galaxy
*Virgo Sup ...

is the 6th astrological sign of the Zodiac
*The Six Dynasties
Six Dynasties (; 220–589 or 222–589) is a collective term for six Han-ruled Chinese dynasties that existed from the early 3rd century AD to the late 6th century AD. The Six Dynasties period overlapped with the era of the Sixteen Kingdoms, ...

form part of Chinese history
*Six is a lucky number in Chinese culture.
*The Birmingham Six
The Birmingham Six were six Irishmen who were each sentenced to life imprisonment in 1975 following their false convictions for the 1974 Birmingham pub bombings. Their convictions were declared unsafe and unsatisfactory and quashed by the Co ...

were a British miscarriage of justice, held in prison for 16 years.
*"Six" is used as an informal slang term for the British Secret Intelligence Service
The Secret Intelligence Service (SIS), commonly known as MI6 ( Military Intelligence, Section 6), is the foreign intelligence service of the United Kingdom, tasked mainly with the covert overseas collection and analysis of human intelligen ...

, MI6.
In other fields

* Six pack is a common form of packaging for six bottles or cans of drink (especially beer), and by extension, other assemblages of six items. *In Pythagoreannumerology
Numerology (also known as arithmancy) is the belief in an occult, divine or mystical relationship between a number and one or more coinciding events. It is also the study of the numerical value, via an alphanumeric system, of the letters in ...

(a pseudoscience
Pseudoscience consists of statements, beliefs, or practices that claim to be both scientific and factual but are incompatible with the scientific method. Pseudoscience is often characterized by contradictory, exaggerated or unfalsifiable claim ...

), the number 6 is the digit of balance, harmony and organization of the home and family
*The fundamental flight instruments
Flight instruments are the instruments in the cockpit of an aircraft that provide the pilot with data about the flight situation of that aircraft, such as altitude, airspeed, vertical speed, heading and much more other crucial information in f ...

lumped together on a cockpit display are often called the Basic Six or six-pack.
*The number of dots in a braille
Braille (Pronounced: ) is a tactile writing system used by people who are visually impaired, including people who are blind, deafblind or who have low vision. It can be read either on embossed paper or by using refreshable braille displ ...

cell.
**See also Six degrees (disambiguation) Six degrees may refer to:
*Six degrees of separation, the theory that anyone on earth can be connected to any other person on the planet through a chain of acquaintances that has no more than five intermediaries
*Six degrees of freedom, motion in t ...

.
*Extrasensory perception
Extrasensory perception or ESP, also called sixth sense, is a claimed paranormal ability pertaining to reception of information not gained through the recognized physical senses, but sensed with the mind. The term was adopted by Duke Universi ...

is sometimes called the "sixth sense".
*Six Flags
Six Flags Entertainment Corporation is an American amusement park corporation, headquartered in Arlington, Texas. It has properties in Canada, Mexico, and the United States. Six Flags owns the most theme parks and waterparks combined of any amu ...

is an American company running amusement parks and theme parks in the U.S., Canada, and Mexico.
*In the U.S. Army
The United States Army (USA) is the land service branch of the United States Armed Forces. It is one of the eight U.S. uniformed services, and is designated as the Army of the United States in the U.S. Constitution.Article II, section 2, ...

"Six" as part of a radio call sign is used by the commanding officer of a unit, while subordinate platoon leaders usually go by "One".
(For a similar example see also: Rainbow Six.)
See also

* List of highways numbered 6References

*''The Odd Number 6'', JA Todd, Math. Proc. Camb. Phil. Soc. 41 (1945) 66–68 *''A Property of the Number Six'', Chapter 6, P Cameron, JH v. Lint, ''Designs, Graphs, Codes and their Links'' *Wells, D. ''The Penguin Dictionary of Curious and Interesting Numbers'' London: Penguin Group. (1987): 67 - 69External links

The Number 6

The Positive Integer 6

{{DEFAULTSORT:6 (Number) Integers 6 (number)