664614328172 has 12 divisors (see below), whose sum is σ = 1170039596880. Its totient is φ = 330317300496.

The previous prime is 664614328153. The next prime is 664614328193. The reversal of 664614328172 is 271823416466.

It is a super-3 number, since 3×664614328172³ (a number of 36 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 664614328172.

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 3 ways as a sum of consecutive naturals, for example, 497465147 + ... + 497466482.

It is an arithmetic number, because the mean of its divisors is an integer number (97503299740).

Almost surely, 2^664614328172 is an apocalyptic number.

It is an amenable number.

664614328172 is a deficient number, since it is larger than the sum of its proper divisors (505425268708).

664614328172 is a wasteful number, since it uses less digits than its factorization.

664614328172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 994931800 (or 994931798 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 50.

The spelling of 664614328172 in words is "six hundred sixty-four billion, six hundred fourteen million, three hundred twenty-eight thousand, one hundred seventy-two".