665056120 has 16 divisors (see below), whose sum is σ = 1496376360. Its totient is φ = 266022432.

The previous prime is 665056097. The next prime is 665056127. The reversal of 665056120 is 21650566.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665056127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8313162 + ... + 8313241.

Almost surely, 2^665056120 is an apocalyptic number.

It is an amenable number.

665056120 is an abundant number, since it is smaller than the sum of its proper divisors (831320240).

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

665056120 is a wasteful number, since it uses less digits than its factorization.

665056120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16626414 (or 16626410 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 665056120 is about 25788.6820136276. The cubic root of 665056120 is about 872.8764264355.

The spelling of 665056120 in words is "six hundred sixty-five million, fifty-six thousand, one hundred twenty".