664179514848 has 72 divisors (see below), whose sum is σ = 1919723832936. Its totient is φ = 217763769600.

The previous prime is 664179514819. The next prime is 664179514861. The reversal of 664179514848 is 848415971466.

664179514848 is a `hidden beast` number, since 6 + 6 + 4 + 1 + 79 + 514 + 8 + 48 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a super-2 number, since 2×664179514848² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18885538 + ... + 18920673.

It is an arithmetic number, because the mean of its divisors is an integer number (26662831013).

Almost surely, 2^664179514848 is an apocalyptic number.

It is an amenable number.

664179514848 is an abundant number, since it is smaller than the sum of its proper divisors (1255544318088).

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

664179514848 is a wasteful number, since it uses less digits than its factorization.

664179514848 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37806288 (or 37806277 counting only the distinct ones).

The product of its digits is 46448640, while the sum is 63.

The spelling of 664179514848 in words is "six hundred sixty-four billion, one hundred seventy-nine million, five hundred fourteen thousand, eight hundred forty-eight".