75 (seventy-five) is the natural number following 74 and preceding 76.

Cardinal	75 seventy-five
Ordinal	75th seventy-fifth
Factorization	$3\; \backslash cdot\; 5^2$
Divisors	3, 5, 15, 25
Roman numeral	LXXV
Binary	1001011
Hexadecimal	4B

In mathematics

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As the sum of the first five pentagonal numbers, seventy-five is a pentagonal pyramidal number. It is also an enneagonal number.

It is also a Keith number, because it recurs in a Fibonacci-like sequence started from its base 10 digits: 7, 5, 12, 17, 29, 46, 75... But there is no integer that added up to its own digits adds up to 75, hence 75 is a self number.

There are 75 uniform polyhedra.

In astronomy

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Messier object M75, a magnitude 9.5 globular cluster in the constellation Sagittarius

The New General Catalogue object NGC 75, a spiral galaxy in the constellation Pisces

In other fields

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Seventy-five is also:

• The atomic number of rhenium
• The age limit for Canadian senators
• The designation of Interstate 75, a freeway that runs from Florida to Michigan.
• The registry of the U.S. Navy's nuclear aircraft carrier USS Harry S. Truman (CVN-75), named after U.S. President Harry S. Truman.
• The record for most game show wins, held by Ian Lygo. Also, the record for most game show appearances, currently a tie between Lygo and Ken Jennings.
• The year AD 75, 75 BC, or 1975.
• A common speed limit, in terms of miles per hour, in the western United States.

Integers

• Sweet 75, a band.
• The beginning of all 5 digit Paris Postal Codes (Not suburbs).

Setenta y cinco | Sepdek kvin | 75 (nombre) | 75 | 75 | Settantacinque | 75 (skaičius) | 75 (getal) | 75 | Setenta e cinco | 75 (число) | 75 (število) | 75 (tal) | 75