665027568 has 30 divisors (see below), whose sum is σ = 1861153944. Its totient is φ = 221675808.

The previous prime is 665027557. The next prime is 665027611. The reversal of 665027568 is 865720566.

665027568 is a `hidden beast` number, since 6 + 65 + 0 + 27 + 568 = 666.

665027568 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2308980 + ... + 2309267.

Almost surely, 2^665027568 is an apocalyptic number.

It is an amenable number.

665027568 is an abundant number, since it is smaller than the sum of its proper divisors (1196126376).

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

665027568 is a wasteful number, since it uses less digits than its factorization.

665027568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4618261 (or 4618252 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 45.

The square root of 665027568 is about 25788.1284315089. The cubic root of 665027568 is about 872.8639348960.

The spelling of 665027568 in words is "six hundred sixty-five million, twenty-seven thousand, five hundred sixty-eight".