72866646 has 24 divisors (see below), whose sum is σ = 158058264. Its totient is φ = 24261120.

The previous prime is 72866623. The next prime is 72866699. The reversal of 72866646 is 64666827.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19350 + ... + 22806.

It is an arithmetic number, because the mean of its divisors is an integer number (6585761).

Almost surely, 2^72866646 is an apocalyptic number.

72866646 is an abundant number, since it is smaller than the sum of its proper divisors (85191618).

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

72866646 is a wasteful number, since it uses less digits than its factorization.

72866646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4636 (or 4633 counting only the distinct ones).

The product of its digits is 580608, while the sum is 45.

The square root of 72866646 is about 8536.1962254859. The cubic root of 72866646 is about 417.6792752017.

The spelling of 72866646 in words is "seventy-two million, eight hundred sixty-six thousand, six hundred forty-six".