72655564 has 6 divisors (see below), whose sum is σ = 127147244. Its totient is φ = 36327780.

The previous prime is 72655559. The next prime is 72655571. The reversal of 72655564 is 46555627.

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 as a sum of consecutive naturals, namely, 9081942 + ... + 9081949.

Almost surely, 2^72655564 is an apocalyptic number.

It is an amenable number.

72655564 is a deficient number, since it is larger than the sum of its proper divisors (54491680).

72655564 is a wasteful number, since it uses less digits than its factorization.

72655564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18163895 (or 18163893 counting only the distinct ones).

The product of its digits is 252000, while the sum is 40.

The square root of 72655564 is about 8523.8233205528. The cubic root of 72655564 is about 417.2755703913.

The spelling of 72655564 in words is "seventy-two million, six hundred fifty-five thousand, five hundred sixty-four".