664578840772 has 48 divisors (see below), whose sum is σ = 1451386460160. Its totient is φ = 258677488800.

The previous prime is 664578840769. The next prime is 664578840781. The reversal of 664578840772 is 277048875466.

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, 718354 + ... + 1358377.

It is an arithmetic number, because the mean of its divisors is an integer number (30237217920).

Almost surely, 2^664578840772 is an apocalyptic number.

It is an amenable number.

664578840772 is an abundant number, since it is smaller than the sum of its proper divisors (786807619388).

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

664578840772 is a wasteful number, since it uses less digits than its factorization.

664578840772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2077792 (or 2077790 counting only the distinct ones).

The product of its (nonzero) digits is 126443520, while the sum is 64.

The spelling of 664578840772 in words is "six hundred sixty-four billion, five hundred seventy-eight million, eight hundred forty thousand, seven hundred seventy-two".