668960507 has 2 divisors, whose sum is σ = 668960508. Its totient is φ = 668960506.

The previous prime is 668960477. The next prime is 668960573. The reversal of 668960507 is 705069866.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 668960507 - 2¹⁰ = 668959483 is a prime.

It is not a weakly prime, because it can be changed into another prime (668960707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334480253 + 334480254.

It is an arithmetic number, because the mean of its divisors is an integer number (334480254).

Almost surely, 2^668960507 is an apocalyptic number.

668960507 is a deficient number, since it is larger than the sum of its proper divisors (1).

668960507 is an equidigital number, since it uses as much as digits as its factorization.

668960507 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 544320, while the sum is 47.

The square root of 668960507 is about 25864.2708576909. The cubic root of 668960507 is about 874.5812448497.

The spelling of 668960507 in words is "six hundred sixty-eight million, nine hundred sixty thousand, five hundred seven".