75811664 has 20 divisors (see below), whose sum is σ = 147862560. Its totient is φ = 37653600.

The previous prime is 75811663. The next prime is 75811679. The reversal of 75811664 is 46611857.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75811661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13274 + ... + 18105.

It is an arithmetic number, because the mean of its divisors is an integer number (7393128).

Almost surely, 2^75811664 is an apocalyptic number.

It is an amenable number.

75811664 is a deficient number, since it is larger than the sum of its proper divisors (72050896).

75811664 is a wasteful number, since it uses less digits than its factorization.

75811664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31538 (or 31532 counting only the distinct ones).

The product of its digits is 40320, while the sum is 38.

The square root of 75811664 is about 8706.9893763574. The cubic root of 75811664 is about 423.2321751117.

The spelling of 75811664 in words is "seventy-five million, eight hundred eleven thousand, six hundred sixty-four".