72656568 has 32 divisors (see below), whose sum is σ = 201824400. Its totient is φ = 24218784.

The previous prime is 72656557. The next prime is 72656569. The reversal of 72656568 is 86565627.

72656568 is a `hidden beast` number, since 7 + 26 + 565 + 68 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72656569) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 167971 + ... + 168402.

Almost surely, 2^72656568 is an apocalyptic number.

It is an amenable number.

72656568 is an abundant number, since it is smaller than the sum of its proper divisors (129167832).

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

72656568 is a wasteful number, since it uses less digits than its factorization.

72656568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336388 (or 336378 counting only the distinct ones).

The product of its digits is 604800, while the sum is 45.

The square root of 72656568 is about 8523.8822141088. The cubic root of 72656568 is about 417.2774924407.

The spelling of 72656568 in words is "seventy-two million, six hundred fifty-six thousand, five hundred sixty-eight".