668053267632 has 80 divisors (see below), whose sum is σ = 1948995796960. Its totient is φ = 219033849600.

The previous prime is 668053267621. The next prime is 668053267703. The reversal of 668053267632 is 236762350866.

668053267632 is a `hidden beast` number, since 6 + 6 + 8 + 0 + 532 + 6 + 76 + 32 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

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 15 ways as a sum of consecutive naturals, for example, 12649219 + ... + 12701922.

It is an arithmetic number, because the mean of its divisors is an integer number (24362447462).

Almost surely, 2^668053267632 is an apocalyptic number.

It is an amenable number.

668053267632 is an abundant number, since it is smaller than the sum of its proper divisors (1280942529328).

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

668053267632 is a wasteful number, since it uses less digits than its factorization.

668053267632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25351219 (or 25351207 counting only the distinct ones).

The product of its (nonzero) digits is 13063680, while the sum is 54.

The spelling of 668053267632 in words is "six hundred sixty-eight billion, fifty-three million, two hundred sixty-seven thousand, six hundred thirty-two".