668800207 has 2 divisors, whose sum is σ = 668800208. Its totient is φ = 668800206.

The previous prime is 668800193. The next prime is 668800261. The reversal of 668800207 is 702008866.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 668800207 - 2⁷ = 668800079 is a prime.

It is equal to p_34719382 and since 668800207 and 34719382 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (668800267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334400103 + 334400104.

It is an arithmetic number, because the mean of its divisors is an integer number (334400104).

Almost surely, 2^668800207 is an apocalyptic number.

668800207 is a deficient number, since it is larger than the sum of its proper divisors (1).

668800207 is an equidigital number, since it uses as much as digits as its factorization.

668800207 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 668800207 is about 25861.1718025305. The cubic root of 668800207 is about 874.5113819447.

The spelling of 668800207 in words is "six hundred sixty-eight million, eight hundred thousand, two hundred seven".