669522793 has 2 divisors, whose sum is σ = 669522794. Its totient is φ = 669522792.

The previous prime is 669522769. The next prime is 669522811. The reversal of 669522793 is 397225966.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 669360384 + 162409 = 25872^2 + 403^2 .

It is a cyclic number.

It is not a de Polignac number, because 669522793 - 2⁵ = 669522761 is a prime.

It is not a weakly prime, because it can be changed into another prime (669022793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334761396 + 334761397.

It is an arithmetic number, because the mean of its divisors is an integer number (334761397).

Almost surely, 2^669522793 is an apocalyptic number.

It is an amenable number.

669522793 is a deficient number, since it is larger than the sum of its proper divisors (1).

669522793 is an equidigital number, since it uses as much as digits as its factorization.

669522793 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1224720, while the sum is 49.

The square root of 669522793 is about 25875.1385117066. The cubic root of 669522793 is about 874.8262155004.

The spelling of 669522793 in words is "six hundred sixty-nine million, five hundred twenty-two thousand, seven hundred ninety-three".