664614311724 has 72 divisors (see below), whose sum is σ = 1877424953040. Its totient is φ = 196486118400.

The previous prime is 664614311689. The next prime is 664614311743. The reversal of 664614311724 is 427113416466.

664614311724 is a `hidden beast` number, since 6 + 6 + 4 + 614 + 3 + 1 + 1 + 7 + 24 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 664614311724.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20451069 + ... + 20483540.

It is an arithmetic number, because the mean of its divisors is an integer number (26075346570).

Almost surely, 2^664614311724 is an apocalyptic number.

It is an amenable number.

664614311724 is an abundant number, since it is smaller than the sum of its proper divisors (1212810641316).

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

664614311724 is a wasteful number, since it uses less digits than its factorization.

664614311724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40934671 (or 40934666 counting only the distinct ones).

The product of its digits is 580608, while the sum is 45.

The spelling of 664614311724 in words is "six hundred sixty-four billion, six hundred fourteen million, three hundred eleven thousand, seven hundred twenty-four".