75401665 has 16 divisors (see below), whose sum is σ = 93614976. Its totient is φ = 58262400.

The previous prime is 75401657. The next prime is 75401693. The reversal of 75401665 is 56610457.

It is a happy number.

It is not a de Polignac number, because 75401665 - 2³ = 75401657 is a prime.

It is a super-2 number, since 2×75401665² = 11370822169544450, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 75401665.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19330 + ... + 22900.

It is an arithmetic number, because the mean of its divisors is an integer number (5850936).

Almost surely, 2^75401665 is an apocalyptic number.

It is an amenable number.

75401665 is a deficient number, since it is larger than the sum of its proper divisors (18213311).

75401665 is a wasteful number, since it uses less digits than its factorization.

75401665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3720.

The product of its (nonzero) digits is 25200, while the sum is 34.

The square root of 75401665 is about 8683.4132114048. The cubic root of 75401665 is about 422.4678313101.

The spelling of 75401665 in words is "seventy-five million, four hundred one thousand, six hundred sixty-five".