664860830426 has 24 divisors (see below), whose sum is σ = 1080148540320. Its totient is φ = 306790235856.

The previous prime is 664860830393. The next prime is 664860830471. The reversal of 664860830426 is 624038068466.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1309781 + ... + 1745063.

It is an arithmetic number, because the mean of its divisors is an integer number (45006189180).

Almost surely, 2^664860830426 is an apocalyptic number.

664860830426 is a deficient number, since it is larger than the sum of its proper divisors (415287709894).

664860830426 is a wasteful number, since it uses less digits than its factorization.

664860830426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439830 (or 439817 counting only the distinct ones).

The product of its (nonzero) digits is 7962624, while the sum is 53.

The spelling of 664860830426 in words is "six hundred sixty-four billion, eight hundred sixty million, eight hundred thirty thousand, four hundred twenty-six".