668051257001 has 2 divisors, whose sum is σ = 668051257002. Its totient is φ = 668051257000.

The previous prime is 668051256979. The next prime is 668051257007. The reversal of 668051257001 is 100752150866.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 577522482601 + 90528774400 = 759949^2 + 300880^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-668051257001 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 668051257001.

It is not a weakly prime, because it can be changed into another prime (668051257007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334025628500 + 334025628501.

It is an arithmetic number, because the mean of its divisors is an integer number (334025628501).

Almost surely, 2^668051257001 is an apocalyptic number.

It is an amenable number.

668051257001 is a deficient number, since it is larger than the sum of its proper divisors (1).

668051257001 is an equidigital number, since it uses as much as digits as its factorization.

668051257001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 100800, while the sum is 41.

The spelling of 668051257001 in words is "six hundred sixty-eight billion, fifty-one million, two hundred fifty-seven thousand, one".