66975692984 has 16 divisors (see below), whose sum is σ = 125651087520. Its totient is φ = 33468736320.

The previous prime is 66975692933. The next prime is 66975693011. The reversal of 66975692984 is 48929657966.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2373872 + ... + 2401919.

It is an arithmetic number, because the mean of its divisors is an integer number (7853192970).

Almost surely, 2^66975692984 is an apocalyptic number.

It is an amenable number.

66975692984 is a deficient number, since it is larger than the sum of its proper divisors (58675394536).

66975692984 is a wasteful number, since it uses less digits than its factorization.

66975692984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4777550 (or 4777546 counting only the distinct ones).

The product of its digits is 352719360, while the sum is 71.

The spelling of 66975692984 in words is "sixty-six billion, nine hundred seventy-five million, six hundred ninety-two thousand, nine hundred eighty-four".