75 (number) - Wikipedia

5(1712)

75 75 is a self number, a pentagonal pyramidal number, a nonagonal number, and a Keith number. It is also the count of weak orderings on four items, the fourth Bell number, and the number of uniform polyhedra in three dimensions..

w88-20.205.175.31 Learn about the number 75, its prime factorization, divisors, arithmetic functions, geometric shapes, and cryptographic hash functions. Find out how 75 relates to other numbers, such as 40, 6, 21, and 3.

75 Learn about the number 75, an odd composite number with two prime factors and six divisors. Find out its scientific notation, square root, cube root, deficiency, and more.