663585916 has 12 divisors (see below), whose sum is σ = 1327171888. Its totient is φ = 284393952.

The previous prime is 663585893. The next prime is 663585947. The reversal of 663585916 is 619585366.

It is a happy number.

663585916 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

663585916 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 663585916.

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, 11849721 + ... + 11849776.

Almost surely, 2^663585916 is an apocalyptic number.

It is an amenable number.

663585916 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

663585916 is a wasteful number, since it uses less digits than its factorization.

663585916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23699508 (or 23699506 counting only the distinct ones).

The product of its digits is 1166400, while the sum is 49.

The square root of 663585916 is about 25760.1614125378. The cubic root of 663585916 is about 872.2327448054.

The spelling of 663585916 in words is "six hundred sixty-three million, five hundred eighty-five thousand, nine hundred sixteen".