669317716993 has 2 divisors, whose sum is σ = 669317716994. Its totient is φ = 669317716992.

The previous prime is 669317716967. The next prime is 669317717023. The reversal of 669317716993 is 399617713966.

It is a happy number.

669317716993 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., 641684306704 + 27633410289 = 801052^2 + 166233^2 .

It is a cyclic number.

It is not a de Polignac number, because 669317716993 - 2¹⁷ = 669317585921 is a prime.

It is not a weakly prime, because it can be changed into another prime (669317717993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334658858496 + 334658858497.

It is an arithmetic number, because the mean of its divisors is an integer number (334658858497).

Almost surely, 2^669317716993 is an apocalyptic number.

It is an amenable number.

669317716993 is a deficient number, since it is larger than the sum of its proper divisors (1).

669317716993 is an equidigital number, since it uses as much as digits as its factorization.

669317716993 is an evil number, because the sum of its binary digits is even.

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

The spelling of 669317716993 in words is "six hundred sixty-nine billion, three hundred seventeen million, seven hundred sixteen thousand, nine hundred ninety-three".