668046636320 has 192 divisors, whose sum is σ = 2010345765120. Its totient is φ = 204225380352.

The previous prime is 668046636311. The next prime is 668046636329. The reversal of 668046636320 is 23636640866.

It is an interprime number because it is at equal distance from previous prime (668046636311) and next prime (668046636329).

It is not an unprimeable number, because it can be changed into a prime (668046636329) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 561569 + ... + 1285088.

It is an arithmetic number, because the mean of its divisors is an integer number (10470550860).

Almost surely, 2^668046636320 is an apocalyptic number.

It is an amenable number.

668046636320 is an abundant number, since it is smaller than the sum of its proper divisors (1342299128800).

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

668046636320 is a wasteful number, since it uses less digits than its factorization.

668046636320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1846715 (or 1846707 counting only the distinct ones).

The product of its (nonzero) digits is 4478976, while the sum is 50.

The spelling of 668046636320 in words is "six hundred sixty-eight billion, forty-six million, six hundred thirty-six thousand, three hundred twenty".