668800313 has 2 divisors, whose sum is σ = 668800314. Its totient is φ = 668800312.

The previous prime is 668800303. The next prime is 668800343. The reversal of 668800313 is 313008866.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 653722624 + 15077689 = 25568^2 + 3883^2 .

It is a cyclic number.

It is not a de Polignac number, because 668800313 - 2¹² = 668796217 is a prime.

It is not a weakly prime, because it can be changed into another prime (668800303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334400156 + 334400157.

It is an arithmetic number, because the mean of its divisors is an integer number (334400157).

Almost surely, 2^668800313 is an apocalyptic number.

It is an amenable number.

668800313 is a deficient number, since it is larger than the sum of its proper divisors (1).

668800313 is an equidigital number, since it uses as much as digits as its factorization.

668800313 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 668800313 is about 25861.1738519349. The cubic root of 668800313 is about 874.5114281459.

The spelling of 668800313 in words is "six hundred sixty-eight million, eight hundred thousand, three hundred thirteen".