72016656 has 20 divisors (see below), whose sum is σ = 186043152. Its totient is φ = 24005536.

The previous prime is 72016619. The next prime is 72016667. The reversal of 72016656 is 65661027.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 750126 + ... + 750221.

Almost surely, 2^72016656 is an apocalyptic number.

It is an amenable number.

72016656 is an abundant number, since it is smaller than the sum of its proper divisors (114026496).

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

72016656 is a wasteful number, since it uses less digits than its factorization.

72016656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1500358 (or 1500352 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 72016656 is about 8486.2627816961. The cubic root of 72016656 is about 416.0488416520.

The spelling of 72016656 in words is "seventy-two million, sixteen thousand, six hundred fifty-six".