669317716939 has 2 divisors, whose sum is σ = 669317716940. Its totient is φ = 669317716938.

The previous prime is 669317716931. The next prime is 669317716967. The reversal of 669317716939 is 939617713966.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 669317716939 - 2³ = 669317716931 is a prime.

It is not a weakly prime, because it can be changed into another prime (669317716931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334658858469 + 334658858470.

It is an arithmetic number, because the mean of its divisors is an integer number (334658858470).

Almost surely, 2^669317716939 is an apocalyptic number.

669317716939 is a deficient number, since it is larger than the sum of its proper divisors (1).

669317716939 is an equidigital number, since it uses as much as digits as its factorization.

669317716939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69441624, while the sum is 67.

The spelling of 669317716939 in words is "six hundred sixty-nine billion, three hundred seventeen million, seven hundred sixteen thousand, nine hundred thirty-nine".