668051256870 has 48 divisors (see below), whose sum is σ = 1740652720560. Its totient is φ = 177765519552.

The previous prime is 668051256853. The next prime is 668051256871. The reversal of 668051256870 is 78652150866.

668051256870 is a `hidden beast` number, since 6 + 6 + 8 + 0 + 5 + 1 + 2 + 568 + 70 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668051256871) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7905285 + ... + 7989344.

It is an arithmetic number, because the mean of its divisors is an integer number (36263598345).

Almost surely, 2^668051256870 is an apocalyptic number.

668051256870 is an abundant number, since it is smaller than the sum of its proper divisors (1072601463690).

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

668051256870 is a wasteful number, since it uses less digits than its factorization.

668051256870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15895109 (or 15895106 counting only the distinct ones).

The product of its (nonzero) digits is 4838400, while the sum is 54.

The spelling of 668051256870 in words is "six hundred sixty-eight billion, fifty-one million, two hundred fifty-six thousand, eight hundred seventy".