664838672124 has 48 divisors (see below), whose sum is σ = 1731672835200. Its totient is φ = 196781000640.

The previous prime is 664838672119. The next prime is 664838672177. The reversal of 664838672124 is 421276838466.

664838672124 is digitally balanced in base 7, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58560099 + ... + 58571450.

It is an arithmetic number, because the mean of its divisors is an integer number (36076517400).

Almost surely, 2^664838672124 is an apocalyptic number.

It is an amenable number.

664838672124 is an abundant number, since it is smaller than the sum of its proper divisors (1066834163076).

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

664838672124 is a wasteful number, since it uses less digits than its factorization.

664838672124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117131610 (or 117131608 counting only the distinct ones).

The product of its digits is 18579456, while the sum is 57.

The spelling of 664838672124 in words is "six hundred sixty-four billion, eight hundred thirty-eight million, six hundred seventy-two thousand, one hundred twenty-four".