66937186956 has 96 divisors (see below), whose sum is σ = 163981440000. Its totient is φ = 21232673280.

The previous prime is 66937186933. The next prime is 66937186961. The reversal of 66937186956 is 65968173966.

66937186956 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3215670 + ... + 3236418.

It is an arithmetic number, because the mean of its divisors is an integer number (1708140000).

Almost surely, 2^66937186956 is an apocalyptic number.

It is an amenable number.

66937186956 is an abundant number, since it is smaller than the sum of its proper divisors (97044253044).

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

66937186956 is a wasteful number, since it uses less digits than its factorization.

66937186956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20959 (or 20957 counting only the distinct ones).

The product of its digits is 88179840, while the sum is 66.

The spelling of 66937186956 in words is "sixty-six billion, nine hundred thirty-seven million, one hundred eighty-six thousand, nine hundred fifty-six".