72770664 has 32 divisors (see below), whose sum is σ = 185800320. Its totient is φ = 23740416.

The previous prime is 72770651. The next prime is 72770699. The reversal of 72770664 is 46607727.

It is a happy number.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31129 + ... + 33384.

It is an arithmetic number, because the mean of its divisors is an integer number (5806260).

Almost surely, 2^72770664 is an apocalyptic number.

It is an amenable number.

72770664 is an abundant number, since it is smaller than the sum of its proper divisors (113029656).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72770664 is a wasteful number, since it uses less digits than its factorization.

72770664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64569 (or 64565 counting only the distinct ones).

The product of its (nonzero) digits is 98784, while the sum is 39.

The square root of 72770664 is about 8530.5723137431. The cubic root of 72770664 is about 417.4958016478.

The spelling of 72770664 in words is "seventy-two million, seven hundred seventy thousand, six hundred sixty-four".