64999072 has 24 divisors (see below), whose sum is σ = 128743776. Its totient is φ = 32302272.

The previous prime is 64999037. The next prime is 64999087. The reversal of 64999072 is 27099946.

It is a super-2 number, since 2×64999072² = 8449758721722368, which contains 22 as substring.

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, 738 + ... + 11425.

It is an arithmetic number, because the mean of its divisors is an integer number (5364324).

Almost surely, 2^64999072 is an apocalyptic number.

It is an amenable number.

64999072 is a deficient number, since it is larger than the sum of its proper divisors (63744704).

64999072 is a wasteful number, since it uses less digits than its factorization.

64999072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12340 (or 12332 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 46.

The square root of 64999072 is about 8062.2001959763. The cubic root of 64999072 is about 402.0706623967.

The spelling of 64999072 in words is "sixty-four million, nine hundred ninety-nine thousand, seventy-two".