72063664 has 20 divisors (see below), whose sum is σ = 139772304. Its totient is φ = 35993408.

The previous prime is 72063619. The next prime is 72063683. The reversal of 72063664 is 46636027.

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, 18669 + ... + 22195.

Almost surely, 2^72063664 is an apocalyptic number.

It is an amenable number.

72063664 is a deficient number, since it is larger than the sum of its proper divisors (67708640).

72063664 is a wasteful number, since it uses less digits than its factorization.

72063664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4812 (or 4806 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 34.

The square root of 72063664 is about 8489.0319825054. The cubic root of 72063664 is about 416.1393455772.

It can be divided in two parts, 72063 and 664, that added together give a palindrome (72727).

The spelling of 72063664 in words is "seventy-two million, sixty-three thousand, six hundred sixty-four".