66176578968 has 32 divisors (see below), whose sum is σ = 165467026800. Its totient is φ = 22055449088.

The previous prime is 66176578931. The next prime is 66176578973. The reversal of 66176578968 is 86987567166.

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, 52221 + ... + 367532.

Almost surely, 2^66176578968 is an apocalyptic number.

It is an amenable number.

66176578968 is an abundant number, since it is smaller than the sum of its proper divisors (99290447832).

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

66176578968 is a wasteful number, since it uses less digits than its factorization.

66176578968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426331 (or 426327 counting only the distinct ones).

The product of its digits is 182891520, while the sum is 69.

The spelling of 66176578968 in words is "sixty-six billion, one hundred seventy-six million, five hundred seventy-eight thousand, nine hundred sixty-eight".