666874318896 has 80 divisors (see below), whose sum is σ = 1914747969120. Its totient is φ = 222225050880.

The previous prime is 666874318883. The next prime is 666874318933. The reversal of 666874318896 is 698813478666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1228306 + ... + 1685966.

It is an arithmetic number, because the mean of its divisors is an integer number (23934349614).

Almost surely, 2^666874318896 is an apocalyptic number.

It is an amenable number.

666874318896 is an abundant number, since it is smaller than the sum of its proper divisors (1247873650224).

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

666874318896 is a wasteful number, since it uses less digits than its factorization.

666874318896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 461051 (or 461039 counting only the distinct ones).

The product of its digits is 501645312, while the sum is 72.

The spelling of 666874318896 in words is "six hundred sixty-six billion, eight hundred seventy-four million, three hundred eighteen thousand, eight hundred ninety-six".