664612053624 has 96 divisors (see below), whose sum is σ = 1897588592640. Its totient is φ = 209829441600.

The previous prime is 664612053571. The next prime is 664612053631. The reversal of 664612053624 is 426350216466.

It is a happy number.

664612053624 is a `hidden beast` number, since 6 + 6 + 4 + 6 + 12 + 0 + 5 + 3 + 624 = 666.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 664612053624.

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 3062812 + ... + 3272619.

It is an arithmetic number, because the mean of its divisors is an integer number (19766547840).

Almost surely, 2^664612053624 is an apocalyptic number.

It is an amenable number.

664612053624 is an abundant number, since it is smaller than the sum of its proper divisors (1232976539016).

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

664612053624 is a wasteful number, since it uses less digits than its factorization.

664612053624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6335521 (or 6335514 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 45.

The spelling of 664612053624 in words is "six hundred sixty-four billion, six hundred twelve million, fifty-three thousand, six hundred twenty-four".