72665612 has 24 divisors (see below), whose sum is σ = 134477952. Its totient is φ = 34300800.

The previous prime is 72665609. The next prime is 72665623. The reversal of 72665612 is 21656627.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2063 + ... + 12230.

It is an arithmetic number, because the mean of its divisors is an integer number (5603248).

Almost surely, 2^72665612 is an apocalyptic number.

It is an amenable number.

72665612 is a deficient number, since it is larger than the sum of its proper divisors (61812340).

72665612 is a wasteful number, since it uses less digits than its factorization.

72665612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14369 (or 14367 counting only the distinct ones).

The product of its digits is 30240, while the sum is 35.

The square root of 72665612 is about 8524.4127070432. The cubic root of 72665612 is about 417.2948054021.

The spelling of 72665612 in words is "seventy-two million, six hundred sixty-five thousand, six hundred twelve".