668051257007 has 2 divisors, whose sum is σ = 668051257008. Its totient is φ = 668051257006.

The previous prime is 668051257001. The next prime is 668051257031. The reversal of 668051257007 is 700752150866.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 668051257007 - 2³⁴ = 650871387823 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (668051257001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334025628503 + 334025628504.

It is an arithmetic number, because the mean of its divisors is an integer number (334025628504).

Almost surely, 2^668051257007 is an apocalyptic number.

668051257007 is a deficient number, since it is larger than the sum of its proper divisors (1).

668051257007 is an equidigital number, since it uses as much as digits as its factorization.

668051257007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 705600, while the sum is 47.

The spelling of 668051257007 in words is "six hundred sixty-eight billion, fifty-one million, two hundred fifty-seven thousand, seven".