66813428164 has 48 divisors (see below), whose sum is σ = 139788028800. Its totient is φ = 27336266496.

The previous prime is 66813428141. The next prime is 66813428219. The reversal of 66813428164 is 46182431866.

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, 389994 + ... + 534529.

It is an arithmetic number, because the mean of its divisors is an integer number (2912250600).

Almost surely, 2^66813428164 is an apocalyptic number.

It is an amenable number.

66813428164 is an abundant number, since it is smaller than the sum of its proper divisors (72974600636).

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

66813428164 is a wasteful number, since it uses less digits than its factorization.

66813428164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 924652 (or 924650 counting only the distinct ones).

The product of its digits is 1327104, while the sum is 49.

The spelling of 66813428164 in words is "sixty-six billion, eight hundred thirteen million, four hundred twenty-eight thousand, one hundred sixty-four".