668303959 has 2 divisors, whose sum is σ = 668303960. Its totient is φ = 668303958.

The previous prime is 668303957. The next prime is 668304011. The reversal of 668303959 is 959303866.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 668303959 - 2¹ = 668303957 is a prime.

Together with 668303957, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (668303957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334151979 + 334151980.

It is an arithmetic number, because the mean of its divisors is an integer number (334151980).

Almost surely, 2^668303959 is an apocalyptic number.

668303959 is a deficient number, since it is larger than the sum of its proper divisors (1).

668303959 is an equidigital number, since it uses as much as digits as its factorization.

668303959 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1049760, while the sum is 49.

The square root of 668303959 is about 25851.5755612690. The cubic root of 668303959 is about 874.2950333750.

The spelling of 668303959 in words is "six hundred sixty-eight million, three hundred three thousand, nine hundred fifty-nine".