666180325264 has 20 divisors (see below), whose sum is σ = 1346842832256. Its totient is φ = 318607981472.

The previous prime is 666180325253. The next prime is 666180325267. The reversal of 666180325264 is 462523081666.

It is not an unprimeable number, because it can be changed into a prime (666180325267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 905135944 + ... + 905136679.

Almost surely, 2^666180325264 is an apocalyptic number.

It is an amenable number.

666180325264 is an abundant number, since it is smaller than the sum of its proper divisors (680662506992).

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

666180325264 is a wasteful number, since it uses less digits than its factorization.

666180325264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1810272654 (or 1810272648 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 49.

The spelling of 666180325264 in words is "six hundred sixty-six billion, one hundred eighty million, three hundred twenty-five thousand, two hundred sixty-four".