666631125232 has 80 divisors (see below), whose sum is σ = 1339453019520. Its totient is φ = 321186007296.

The previous prime is 666631125179. The next prime is 666631125239. The reversal of 666631125232 is 232521136666.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666631125239) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42191958 + ... + 42207754.

It is an arithmetic number, because the mean of its divisors is an integer number (16743162744).

Almost surely, 2^666631125232 is an apocalyptic number.

It is an amenable number.

666631125232 is an abundant number, since it is smaller than the sum of its proper divisors (672821894288).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

666631125232 is a wasteful number, since it uses less digits than its factorization.

666631125232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16670 (or 16664 counting only the distinct ones).

The product of its digits is 466560, while the sum is 43.

The spelling of 666631125232 in words is "six hundred sixty-six billion, six hundred thirty-one million, one hundred twenty-five thousand, two hundred thirty-two".