669409008 has 40 divisors (see below), whose sum is σ = 1733067648. Its totient is φ = 222651072.

The previous prime is 669408977. The next prime is 669409019. The reversal of 669409008 is 800904966.

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, 7485 + ... + 37347.

Almost surely, 2^669409008 is an apocalyptic number.

It is an amenable number.

669409008 is an abundant number, since it is smaller than the sum of its proper divisors (1063658640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

669409008 is a wasteful number, since it uses less digits than its factorization.

669409008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30341 (or 30335 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 42.

The square root of 669409008 is about 25872.9396860890. The cubic root of 669409008 is about 874.7766539612.

The spelling of 669409008 in words is "six hundred sixty-nine million, four hundred nine thousand, eight".