665117488 has 40 divisors (see below), whose sum is σ = 1477543328. Its totient is φ = 284124672.

The previous prime is 665117459. The next prime is 665117489. The reversal of 665117488 is 884711566.

It is not an unprimeable number, because it can be changed into a prime (665117489) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25570 + ... + 44542.

Almost surely, 2^665117488 is an apocalyptic number.

It is an amenable number.

665117488 is an abundant number, since it is smaller than the sum of its proper divisors (812425840).

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

665117488 is a wasteful number, since it uses less digits than its factorization.

665117488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19301 (or 19295 counting only the distinct ones).

The product of its digits is 322560, while the sum is 46.

The square root of 665117488 is about 25789.8718104608. The cubic root of 665117488 is about 872.9032738105.

The spelling of 665117488 in words is "six hundred sixty-five million, one hundred seventeen thousand, four hundred eighty-eight".