65664272 has 20 divisors (see below), whose sum is σ = 127896576. Its totient is φ = 32658720.

The previous prime is 65664259. The next prime is 65664281. The reversal of 65664272 is 27246656.

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, 7688 + ... + 13799.

Almost surely, 2^65664272 is an apocalyptic number.

It is an amenable number.

65664272 is a deficient number, since it is larger than the sum of its proper divisors (62232304).

65664272 is a wasteful number, since it uses less digits than its factorization.

65664272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21686 (or 21680 counting only the distinct ones).

The product of its digits is 120960, while the sum is 38.

The square root of 65664272 is about 8103.3494309452. The cubic root of 65664272 is about 403.4376058676.

The spelling of 65664272 in words is "sixty-five million, six hundred sixty-four thousand, two hundred seventy-two".