665006120 has 16 divisors (see below), whose sum is σ = 1496263860. Its totient is φ = 266002432.

The previous prime is 665006117. The next prime is 665006161. The reversal of 665006120 is 21600566.

It can be written as a sum of positive squares in 2 ways, for example, as 663886756 + 1119364 = 25766^2 + 1058^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 665006120.

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, 8312537 + ... + 8312616.

Almost surely, 2^665006120 is an apocalyptic number.

It is an amenable number.

665006120 is an abundant number, since it is smaller than the sum of its proper divisors (831257740).

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

665006120 is a wasteful number, since it uses less digits than its factorization.

665006120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16625164 (or 16625160 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 665006120 is about 25787.7125778926. The cubic root of 665006120 is about 872.8545511312.

Adding to 665006120 its reverse (21600566), we get a palindrome (686606686).

The spelling of 665006120 in words is "six hundred sixty-five million, six thousand, one hundred twenty".