668675760631 has 2 divisors, whose sum is σ = 668675760632. Its totient is φ = 668675760630.

The previous prime is 668675760593. The next prime is 668675760647. The reversal of 668675760631 is 136067576866.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 668675760631 - 2⁷ = 668675760503 is a prime.

It is a super-2 number, since 2×668675760631² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 668675760631.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (668675760031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334337880315 + 334337880316.

It is an arithmetic number, because the mean of its divisors is an integer number (334337880316).

Almost surely, 2^668675760631 is an apocalyptic number.

668675760631 is a deficient number, since it is larger than the sum of its proper divisors (1).

668675760631 is an equidigital number, since it uses as much as digits as its factorization.

668675760631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45722880, while the sum is 61.

The spelling of 668675760631 in words is "six hundred sixty-eight billion, six hundred seventy-five million, seven hundred sixty thousand, six hundred thirty-one".