663055388 has 24 divisors (see below), whose sum is σ = 1222475520. Its totient is φ = 313806960.

The previous prime is 663055363. The next prime is 663055397. The reversal of 663055388 is 883550366.

It is a congruent number.

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, 105083 + ... + 111213.

It is an arithmetic number, because the mean of its divisors is an integer number (50936480).

Almost surely, 2^663055388 is an apocalyptic number.

It is an amenable number.

663055388 is a deficient number, since it is larger than the sum of its proper divisors (559420132).

663055388 is a wasteful number, since it uses less digits than its factorization.

663055388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7577 (or 7575 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 44.

The square root of 663055388 is about 25749.8619025423. The cubic root of 663055388 is about 872.0002367224. Note that the first 3 decimals are identical.

The spelling of 663055388 in words is "six hundred sixty-three million, fifty-five thousand, three hundred eighty-eight".