668546252688 has 40 divisors (see below), whose sum is σ = 1727108127648. Its totient is φ = 222844840192.

The previous prime is 668546252687. The next prime is 668546252713. The reversal of 668546252688 is 886252645866.

It is not an unprimeable number, because it can be changed into a prime (668546252687) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4265731 + ... + 4419677.

Almost surely, 2^668546252688 is an apocalyptic number.

It is an amenable number.

668546252688 is an abundant number, since it is smaller than the sum of its proper divisors (1058561874960).

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

668546252688 is a wasteful number, since it uses less digits than its factorization.

668546252688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244431 (or 244425 counting only the distinct ones).

The product of its digits is 265420800, while the sum is 66.

The spelling of 668546252688 in words is "six hundred sixty-eight billion, five hundred forty-six million, two hundred fifty-two thousand, six hundred eighty-eight".