669149438 has 16 divisors (see below), whose sum is σ = 1032647616. Its totient is φ = 325004160.

The previous prime is 669149413. The next prime is 669149447. The reversal of 669149438 is 834941966.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1595 + ... + 36617.

It is an arithmetic number, because the mean of its divisors is an integer number (64540476).

Almost surely, 2^669149438 is an apocalyptic number.

669149438 is a deficient number, since it is larger than the sum of its proper divisors (363498178).

669149438 is a wasteful number, since it uses less digits than its factorization.

669149438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35299.

The product of its digits is 1119744, while the sum is 50.

The square root of 669149438 is about 25867.9229548876. The cubic root of 669149438 is about 874.6635715613.

The spelling of 669149438 in words is "six hundred sixty-nine million, one hundred forty-nine thousand, four hundred thirty-eight".