668573207 has 2 divisors, whose sum is σ = 668573208. Its totient is φ = 668573206.

The previous prime is 668573203. The next prime is 668573231. The reversal of 668573207 is 702375866.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 668573207 - 2² = 668573203 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (668573203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334286603 + 334286604.

It is an arithmetic number, because the mean of its divisors is an integer number (334286604).

Almost surely, 2^668573207 is an apocalyptic number.

668573207 is a deficient number, since it is larger than the sum of its proper divisors (1).

668573207 is an equidigital number, since it uses as much as digits as its factorization.

668573207 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 423360, while the sum is 44.

The square root of 668573207 is about 25856.7826111448. The cubic root of 668573207 is about 874.4124303468.

The spelling of 668573207 in words is "six hundred sixty-eight million, five hundred seventy-three thousand, two hundred seven".