666572372 has 24 divisors (see below), whose sum is σ = 1175479200. Its totient is φ = 330729696.

The previous prime is 666572341. The next prime is 666572381. The reversal of 666572372 is 273275666.

It is a super-2 number, since 2×666572372² = 888637454227412768, which contains 22 as substring.

It is a congruent number.

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, 593003 + ... + 594125.

It is an arithmetic number, because the mean of its divisors is an integer number (48978300).

Almost surely, 2^666572372 is an apocalyptic number.

It is an amenable number.

666572372 is a deficient number, since it is larger than the sum of its proper divisors (508906828).

666572372 is a wasteful number, since it uses less digits than its factorization.

666572372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2135 (or 2133 counting only the distinct ones).

The product of its digits is 635040, while the sum is 44.

The square root of 666572372 is about 25818.0629017748. The cubic root of 666572372 is about 873.5392758049.

The spelling of 666572372 in words is "six hundred sixty-six million, five hundred seventy-two thousand, three hundred seventy-two".