66 (sixty-six) is the

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 65 and preceding 67. Usages of this number include:

In mathematics

66 is: *a

sphenic number In number theory, a sphenic number (from grc, σφήνα, 'wedge') is a positive integer that is the product of three distinct prime numbers. Because there are infinitely many prime numbers, there are also infinitely many sphenic numbers. Definit ...

. *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 i ...

. *a

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 ...

. *a

semi-meandric number In mathematics, a meander or closed meander is a self-avoiding closed curve which intersects a line a number of times. Intuitively, a meander can be viewed as a road crossing a river through a number of bridges. Meander Given a fixed oriented li ...

. *a

semiperfect number In number theory, a semiperfect number or pseudoperfect number is a natural number ''n'' that is equal to the sum of all or some of its proper divisors. A semiperfect number that is equal to the sum of all its proper divisors is a perfect number. ...

, being a multiple of 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. ...

. *an

Erdős–Woods number In number theory, a positive integer is said to be an Erdős–Woods number if it has the following property: there exists a positive integer such that in the sequence of consecutive integers, each of the elements has a non-trivial common factor ...

, since it is possible to find sequences of 66 consecutive integers such that each inner member shares a factor with either the first or the last member. *palindromic and a

repdigit In recreational mathematics, a repdigit or sometimes monodigit is a natural number composed of repeated instances of the same digit in a positional number system (often implicitly decimal). The word is a portmanteau of repeated and digit. Example ...

in bases 10 (66₁₀), 21 (33₂₁) and 32 (22₃₂)

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 ...

Spiral Galaxy M66, a

magnitude Magnitude may refer to: Mathematics *Euclidean vector, a quantity defined by both its magnitude and its direction *Magnitude (mathematics), the relative size of an object *Norm (mathematics), a term for the size or length of a vector *Order of ...

10.0 galaxy in the constellation Leo. *The New General Catalogue object NGC 66, a peculiar

barred spiral galaxy A barred spiral galaxy is a spiral galaxy with a central bar-shaped structure composed of stars. Bars are found in about two thirds of all spiral galaxies, and generally affect both the motions of stars and interstellar gas within spiral galaxies ...

in the constellation

Cetus Cetus () is a constellation, sometimes called 'the whale' in English. The Cetus was a sea monster in Greek mythology which both Perseus and Heracles needed to slay. Cetus is in the region of the sky that contains other water-related constellat ...

. * 66 Maja, a carbonaceous background asteroid from the central regions of the asteroid belt.

Physics

*The

atomic 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 every ...

dysprosium Dysprosium is the chemical element with the symbol Dy and atomic number 66. It is a rare-earth element in the lanthanide series with a metallic silver luster. Dysprosium is never found in nature as a free element, though, like other lanthanides, ...

, a lanthanide.

In computing

66 (more specifically 66.667) megahertz (MHz) is a common divisor for the

front side bus A front-side bus (FSB) is a computer communication interface ( bus) that was often used in Intel-chip-based computers during the 1990s and 2000s. The EV6 bus served the same function for competing AMD CPUs. Both typically carry data between the ...

(FSB) speed, overall

central processing unit A central processing unit (CPU), also called a central processor, main processor or just Processor (computing), processor, is the electronic circuitry that executes Instruction (computing), instructions comprising a computer program. The CPU per ...

(CPU) speed, and base bus speed. On a Core 2 CPU, and a Core 2 motherboard, the FSB is 1066 MHz (~16 × 66 MHz), the memory speed is usually 666.67 MHz (~10 × 66 MHz), and the processor speed ranges from 1.86 gigahertz (GHz) (~66 MHz × 28) to 2.93 GHz (~66 MHz × 44), in 266 MHz (~66 MHz × 4) increments.

In motor vehicle transportation

*The designation of the historic

U.S. Route 66 U.S. Route 66 or U.S. Highway 66 (US 66 or Route 66) was one of the original highways in the United States Numbered Highway System. It was established on November 11, 1926, with road signs erected the following year. The h ...

, dubbed the "Mother Road" by novelist John Steinbeck, and

other roads ''Other Roads'' is the tenth studio album by Boz Scaggs released in 1988. After an eight-year hiatus from recording, Scaggs returned in 1988 with this album, a record aimed primarily at the adult contemporary market. The album reached #47 on t ...

. * Phillips 66, a brand of

gasoline Gasoline (; ) or petrol (; ) (see ) is a transparent, petroleum-derived flammable liquid that is used primarily as a fuel in most spark-ignited internal combustion engines (also known as petrol engines). It consists mostly of organi ...

and service station in the United States.

In religion

*The total number of chapters in the

Bible The Bible (from Koine Greek , , 'the books') is a collection of religious texts or scriptures that are held to be sacred in Christianity, Judaism, Samaritanism, and many other religions. The Bible is an anthologya compilation of texts ...

Book of Isaiah. *The number of verses in Chapter 3 of the

Book of Lamentations The Book of Lamentations ( he, אֵיכָה, , from its incipit meaning "how") is a collection of poetic laments for the destruction of Jerusalem in 586 BCE. In the Hebrew Bible it appears in the Ketuvim ("Writings") as one of the Five Megill ...

in the Old Testament. *The total number of books in the Protestant edition of the

( Old Testament and

New Testament The New Testament grc, Ἡ Καινὴ Διαθήκη, transl. ; la, Novum Testamentum. (NT) is the second division of the Christian biblical canon. It discusses the teachings and person of Jesus, as well as events in first-century Chri ...

) combined. *In

Abjad numerals The Abjad numerals, also called Hisab al-Jummal ( ar, حِسَاب ٱلْجُمَّل, ), are a decimal alphabetic numeral system/ alphanumeric code, in which the 28 letters of the Arabic alphabet are assigned numerical values. They have been ...

, The Name Of Allah (الله) numeric value is 66.

In sports

*The number of the laps of the

Spanish Grand Prix The Spanish Grand Prix ( es, Gran Premio de España, ca, Gran Premi d'Espanya) is a Formula One motor racing event currently held at the Circuit de Barcelona-Catalunya. The race is one of the oldest in the world still contested, celebrating it ...

. *The longest field goal made in NFL history was 66 yards and kicked by

Justin Tucker Justin Paul Tucker (born November 21, 1989) is an American football placekicker for the Baltimore Ravens of the National Football League (NFL). He played college football at Texas and was signed by the Ravens as an undrafted free agent in 2012 ...

In entertainment

Cinema

*'' Sixty Six'' is a 2006 British movie about a bar mitzvah in London on the day of the

1966 World Cup final The 1966 FIFA World Cup Final was a association football, football match played at Wembley Stadium (1923), Wembley Stadium, London, on 30 July 1966 to determine the winner of the 1966 FIFA World Cup, the eighth FIFA World Cup. The match was conte ...

. *In the '' Star Wars'' movie series, Order 66 is a prepared order to the

clone troopers Clone troopers are fictional characters in the ''Star Wars'' franchise created by George Lucas. They have been featured in a number of ''Star Wars'' media, including the live-action films '' Episode II: Attack of the Clones'' (2002) and '' Ep ...

to kill the

Jedi Jedi (), Jedi Knights, or collectively the Jedi Order are the main heroic protagonists of many works of the '' Star Wars'' franchise. Working symbiotically alongside the Old Galactic Republic, and later supporting the Rebel Alliance, the Jedi ...

commanding them.

Television

* ''Route 66'' was a popular US television series on

CBS CBS Broadcasting Inc., commonly shortened to CBS, the abbreviation of its former legal name Columbia Broadcasting System, is an American commercial broadcast television and radio network serving as the flagship property of the CBS Entertainm ...

from 1960 to 1964.

Video games

*In the video game ''

Fullmetal Alchemist is a Japanese manga series written and illustrated by Hiromu Arakawa. It was serialized in Square Enix's ''shōnen'' manga anthology magazine '' Monthly Shōnen Gangan'' between July 2001 and June 2010; the publisher later collected th ...

'', elusive villain Barry the Chopper is imprisoned in cell number 66, which later becomes his alias when battling the brothers at Laboratory Five.

In other fields

*The international direct dialing (IDD) code for

Thailand Thailand ( ), historically known as Siam () and officially the Kingdom of Thailand, is a country in Southeast Asia, located at the centre of the Indochinese Peninsula, spanning , with a population of almost 70 million. The country is b ...

. *The number of the French department Pyrénées-Orientales. *The name of a

German German(s) may refer to: * Germany (of or related to) ** Germania (historical use) * Germans, citizens of Germany, people of German ancestry, or native speakers of the German language ** For citizens of Germany, see also German nationality law **Ge ...

card game A card game is any game using playing cards as the primary device with which the game is played, be they traditional or game-specific. Countless card games exist, including families of related games (such as poker). A small number of card ga ...

, translated from ''sechsundsechzig'' (see Sixty-six (game)). *In

telecommunications Telecommunication is the transmission of information by various types of technologies over wire, radio, optical, or other electromagnetic systems. It has its origin in the desire of humans for communication over a distance greater than that fe ...

66 block 66 may refer to: * 66 (number) * One of the years 66 BC, AD 66, 1966, 2066 *66 (song), "66" (song), a song by Lil Yachty featuring Trippie Redd *66, a song by The Afghan Whigs, from the album 1965 (album), 1965 *Sixty-Six (card game), a German card ...

is used to organize telephone lines. *Sergio Mendes and Brasil '66 was a 1960s group. *66 WNBC radio was a popular New York radio station, which became

WFAN WFAN (660 AM) is a commercial radio station licensed to New York, New York, carrying a sports radio format known as "Sports Radio 66 AM and 101.9 FM" or "The Fan". Owned by Audacy, Inc., the station serves the New York metropolitan area while ...

on 1 July 1987. *

Lil B Brandon Christopher McCartney (born August 17, 1989), professionally known as Lil B and as his alter ego The BasedGod, is an American rapper. Lil B has recorded both solo and with Bay Area group The Pack. His solo work spans several genres, i ...

has a song entitled "OMG 66". * "Sixty-Six" is a song by

Pat Metheny Patrick Bruce Metheny ( ; born August 12, 1954) is an American jazz guitarist and composer. He is the leader of the Pat Metheny Group and is also involved in duets, solo works, and other side projects. His style incorporates elements of progre ...

(born 1954) from his 2020 album From This Place. * '' Le 66'' is an

opérette This is a glossary list of opera genres, giving alternative names. "Opera" is an Italian word (short for "opera in musica"); it was not at first ''commonly'' used in Italy (or in other countries) to refer to the genre of particular works. Most c ...

in one act of 1856 with music by

Jacques Offenbach Jacques Offenbach (, also , , ; 20 June 18195 October 1880) was a German-born French composer, cellist and impresario of the Romantic period. He is remembered for his nearly 100 operettas of the 1850s to the 1870s, and his uncompleted opera ' ...

and a French libretto by Pittaud de Forges and Laurencin. *In the

horror genre Horror is a genre of fiction which is intended to frighten, scare, or disgust. Horror is often divided into the sub-genres of psychological horror and supernatural horror, which is in the realm of speculative fiction. Literary historian ...

and

Western esotericism Western esotericism, also known as esotericism, esoterism, and sometimes the Western mystery tradition, is a term scholars use to categorise a wide range of loosely related ideas and movements that developed within Western society. These ideas ...

there are 66 legions of demons/spirits that Baal controls.

References

External links

*{{Commons category-inline Integers