665422008 has 16 divisors (see below), whose sum is σ = 1663555080. Its totient is φ = 221807328.

The previous prime is 665421983. The next prime is 665422057. The reversal of 665422008 is 800224566.

It is a self number, because there is not a number n which added to its sum of digits gives 665422008.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13862935 + ... + 13862982.

Almost surely, 2^665422008 is an apocalyptic number.

It is an amenable number.

665422008 is an abundant number, since it is smaller than the sum of its proper divisors (998133072).

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

665422008 is a wasteful number, since it uses less digits than its factorization.

665422008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27725926 (or 27725922 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 33.

The square root of 665422008 is about 25795.7750028953. The cubic root of 665422008 is about 873.0364713044.

The spelling of 665422008 in words is "six hundred sixty-five million, four hundred twenty-two thousand, eight".