669396235922 has 18 divisors (see below), whose sum is σ = 1059757654293. Its totient is φ = 317072013984.

The previous prime is 669396235909. The next prime is 669396235967. The reversal of 669396235922 is 229532693966.

It can be written as a sum of positive squares in 2 ways, for example, as 550461608761 + 118934627161 = 741931^2 + 344869^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=578531.

It is a Smith number, since the sum of its digits (62) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 21968954 + ... + 21999402.

Almost surely, 2^669396235922 is an apocalyptic number.

669396235922 is a deficient number, since it is larger than the sum of its proper divisors (390361418371).

669396235922 is an frugal number, since it uses more digits than its factorization.

669396235922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60938 (or 30470 counting only the distinct ones).

The product of its digits is 56687040, while the sum is 62.

The spelling of 669396235922 in words is "six hundred sixty-nine billion, three hundred ninety-six million, two hundred thirty-five thousand, nine hundred twenty-two".