668424960013 has 2 divisors, whose sum is σ = 668424960014. Its totient is φ = 668424960012.

The previous prime is 668424959999. The next prime is 668424960053. The reversal of 668424960013 is 310069424866.

668424960013 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 640235221609 + 28189738404 = 800147^2 + 167898^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-668424960013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (668424960053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334212480006 + 334212480007.

It is an arithmetic number, because the mean of its divisors is an integer number (334212480007).

Almost surely, 2^668424960013 is an apocalyptic number.

It is an amenable number.

668424960013 is a deficient number, since it is larger than the sum of its proper divisors (1).

668424960013 is an equidigital number, since it uses as much as digits as its factorization.

668424960013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1492992, while the sum is 49.

The spelling of 668424960013 in words is "six hundred sixty-eight billion, four hundred twenty-four million, nine hundred sixty thousand, thirteen".