664841363252 has 48 divisors (see below), whose sum is σ = 1272293664768. Its totient is φ = 301474919520.

The previous prime is 664841363237. The next prime is 664841363299. The reversal of 664841363252 is 252363148466.

664841363252 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 664841363252.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40464263 + ... + 40480689.

It is an arithmetic number, because the mean of its divisors is an integer number (26506118016).

Almost surely, 2^664841363252 is an apocalyptic number.

It is an amenable number.

664841363252 is a deficient number, since it is larger than the sum of its proper divisors (607452301516).

664841363252 is a wasteful number, since it uses less digits than its factorization.

664841363252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18596 (or 18594 counting only the distinct ones).

The product of its digits is 4976640, while the sum is 50.

The spelling of 664841363252 in words is "six hundred sixty-four billion, eight hundred forty-one million, three hundred sixty-three thousand, two hundred fifty-two".