665560616 has 32 divisors (see below), whose sum is σ = 1427736000. Its totient is φ = 284933376.

The previous prime is 665560589. The next prime is 665560627. The reversal of 665560616 is 616065566.

665560616 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50615 + ... + 62393.

It is an arithmetic number, because the mean of its divisors is an integer number (44616750).

Almost surely, 2^665560616 is an apocalyptic number.

It is an amenable number.

665560616 is an abundant number, since it is smaller than the sum of its proper divisors (762175384).

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

665560616 is a wasteful number, since it uses less digits than its factorization.

665560616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12801 (or 12797 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 41.

The square root of 665560616 is about 25798.4615045161. The cubic root of 665560616 is about 873.0970851888.

The spelling of 665560616 in words is "six hundred sixty-five million, five hundred sixty thousand, six hundred sixteen".