70 (number)

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← 70 71 72 73 74 75 76 77 78 79 → List of numbers — Integers 0 10 20 30 40 50 60 70 80 90 →
Cardinal	70 seventy
Ordinal	70th seventieth
Factorization	$2 \cdot 5 \cdot 7$
Divisors	1, 2, 5, 7, 10, 14, 35, 70
Roman numeral	LXX
Roman numeral (Unicode)	LXX, lxx
Binary	1000110
Octal	106
Duodecimal	5A
Hexadecimal	46
Hebrew	ע (Ayin)

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70 (seventy) is the natural number following 69 and preceding 71.

1 In mathematics
2 In science
- 2.1 Astronomy
3 In religion
4 In other fields
5 Notes

[edit] In mathematics

70 is a Pell number and a Harshad number. Its factorization makes it a sphenic number. It is the seventh pentagonal number and the fourth 13 -gonal number, as well as the fifth pentatope number. It is the smallest weird number.

[edit] In science

70 is the atomic number of ytterbium, a lanthanide

[edit] Astronomy

Messier object M70, a magnitude 9.0 globular cluster in the constellation Sagittarius
The New General Catalogue object NGC 70, a magnitude 13.4 spiral galaxy in the constellation Andromeda
The Saros number of the solar eclipse series which began on -821 September 5 and ended on 676 February 19. The duration of Saros series 70 was 1496.5 years, and it contained 84 solar eclipses. Further, the Saros number of the lunar eclipse series which began on -519 June 13 and ended on 761 July 21. The duration of Saros series 70 was 1280.1 years, and it contained 72 lunar eclipses.

[edit] In religion

Seventy souls went down to Egypt to begin the Hebrew's Egyptian exile (Genesis 46:27)
According to Jewish tradition, there are a core of 70 nations and 70 world languages
Seventy elders were assembled by Moses on God's command in the desert (Numbers 11:16-30)
Ptolemy II Philadelphus ordered 72 Jewish elders to translate the Torah into Greek; the result was the Septuagint (from the Latin for "seventy")
In the Gospel of Matthew, 18:21-22, Jesus tells Peter to forgive people seventy times seven times.
In the Gospel of Luke 10:1-24, Jesus appoints Seventy Disciples and sends them out in pairs to preach the Gospel.
Seventy, a priesthood office of The Church of Jesus Christ of Latter-day Saints and other Latter Day Saint sects.

[edit] In other fields

Joe Hundred Guy counts to 70 in 10s on an episode of Sesame Street. He gets stuck at 70, and worries what the women will think of him, once they find out he can't count to 100. See List of Muppets based on celebrities.

70 is:

the designation of USA Interstate 70, a freeway that goes from Utah to Maryland
In miles per hour, a common speed limit for freeways in many American states, primarily in the central United States (in the Eastern U.S. the speed limit is generally 65, in the Western U.S. it is 75).
In miles per hour, the national speed limit in the United Kingdom.
In years of marriage, the platinum wedding anniversary
The registry of the U.S. Navy's nuclear aircraft carrier USS Carl Vinson (CVN-70), named after U.S. Representative Carl Vinson.
The number of the French department Haute-Saône.
Historical years: AD 70, 70 BC, or 1970.
The number 70 is the subject of the Boards of Canada song, "The Smallest Weird Number" on the 2002 album, Geogaddi.