664881475315 has 8 divisors (see below), whose sum is σ = 798016641408. Its totient is φ = 531799266240.

The previous prime is 664881475277. The next prime is 664881475327. The reversal of 664881475315 is 513574188466.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-664881475315 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 664881475315.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13211626 + ... + 13261855.

It is an arithmetic number, because the mean of its divisors is an integer number (99752080176).

Almost surely, 2^664881475315 is an apocalyptic number.

664881475315 is a deficient number, since it is larger than the sum of its proper divisors (133135166093).

664881475315 is a wasteful number, since it uses less digits than its factorization.

664881475315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26478509.

The product of its digits is 19353600, while the sum is 58.

The spelling of 664881475315 in words is "six hundred sixty-four billion, eight hundred eighty-one million, four hundred seventy-five thousand, three hundred fifteen".