668007317 has 2 divisors, whose sum is σ = 668007318. Its totient is φ = 668007316.

The previous prime is 668007311. The next prime is 668007341. The reversal of 668007317 is 713700866.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 574033681 + 93973636 = 23959^2 + 9694^2 .

It is a cyclic number.

It is not a de Polignac number, because 668007317 - 2¹⁸ = 667745173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (668007311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334003658 + 334003659.

It is an arithmetic number, because the mean of its divisors is an integer number (334003659).

Almost surely, 2^668007317 is an apocalyptic number.

It is an amenable number.

668007317 is a deficient number, since it is larger than the sum of its proper divisors (1).

668007317 is an equidigital number, since it uses as much as digits as its factorization.

668007317 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 42336, while the sum is 38.

The square root of 668007317 is about 25845.8375178674. The cubic root of 668007317 is about 874.1656556139.

The spelling of 668007317 in words is "six hundred sixty-eight million, seven thousand, three hundred seventeen".