75961665 has 32 divisors (see below), whose sum is σ = 145434240. Its totient is φ = 37395648.

The previous prime is 75961637. The next prime is 75961727. The reversal of 75961665 is 56616957.

It is not a de Polignac number, because 75961665 - 2¹⁷ = 75830593 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 75961665.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19887 + ... + 23396.

It is an arithmetic number, because the mean of its divisors is an integer number (4544820).

Almost surely, 2^75961665 is an apocalyptic number.

It is an amenable number.

75961665 is a deficient number, since it is larger than the sum of its proper divisors (69472575).

75961665 is a wasteful number, since it uses less digits than its factorization.

75961665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43310 (or 43304 counting only the distinct ones).

The product of its digits is 340200, while the sum is 45.

The square root of 75961665 is about 8715.5989467162. The cubic root of 75961665 is about 423.5111270190.

It can be divided in two parts, 7596 and 1665, that added together give a cube (9261 = 21³).

The spelling of 75961665 in words is "seventy-five million, nine hundred sixty-one thousand, six hundred sixty-five".