665608568 has 16 divisors (see below), whose sum is σ = 1260883680. Its totient is φ = 329372928.

The previous prime is 665608543. The next prime is 665608571. The reversal of 665608568 is 865806566.

665608568 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 3 ways as a sum of consecutive naturals, for example, 428096 + ... + 429647.

It is an arithmetic number, because the mean of its divisors is an integer number (78805230).

Almost surely, 2^665608568 is an apocalyptic number.

It is an amenable number.

665608568 is a deficient number, since it is larger than the sum of its proper divisors (595275112).

665608568 is a wasteful number, since it uses less digits than its factorization.

665608568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 857846 (or 857842 counting only the distinct ones).

The product of its (nonzero) digits is 2073600, while the sum is 50.

The square root of 665608568 is about 25799.3908455219. The cubic root of 665608568 is about 873.1180528488.

The spelling of 665608568 in words is "six hundred sixty-five million, six hundred eight thousand, five hundred sixty-eight".