663220016 has 20 divisors (see below), whose sum is σ = 1288068600. Its totient is φ = 330815232.

The previous prime is 663220007. The next prime is 663220021. The reversal of 663220016 is 610022366.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42761 + ... + 56168.

It is an arithmetic number, because the mean of its divisors is an integer number (64403430).

Almost surely, 2^663220016 is an apocalyptic number.

It is an amenable number.

663220016 is a deficient number, since it is larger than the sum of its proper divisors (624848584).

663220016 is a wasteful number, since it uses less digits than its factorization.

663220016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99356 (or 99350 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 663220016 is about 25753.0583814816. The cubic root of 663220016 is about 872.0723995101.

The spelling of 663220016 in words is "six hundred sixty-three million, two hundred twenty thousand, sixteen".