664416245544624 has 60 divisors (see below), whose sum is σ = 1957308091780600. Its totient is φ = 209815656486912.

The previous prime is 664416245544607. The next prime is 664416245544671. The reversal of 664416245544624 is 426445542614466.

664416245544624 is a `hidden beast` number, since 6 + 6 + 4 + 4 + 1 + 6 + 24 + 5 + 544 + 62 + 4 = 666.

It is a super-2 number, since 2×664416245544624² (a number of 30 digits) contains 22 as substring.

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 11 ways as a sum of consecutive naturals, for example, 121421094769 + ... + 121421100240.

Almost surely, 2^{664416245544624} is an apocalyptic number.

It is an amenable number.

664416245544624 is an abundant number, since it is smaller than the sum of its proper divisors (1292891846235976).

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

664416245544624 is a wasteful number, since it uses less digits than its factorization.

664416245544624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242842195042 (or 242842195033 counting only the distinct ones).

The product of its digits is 530841600, while the sum is 63.

The spelling of 664416245544624 in words is "six hundred sixty-four trillion, four hundred sixteen billion, two hundred forty-five million, five hundred forty-four thousand, six hundred twenty-four".