663655064 has 32 divisors (see below), whose sum is σ = 1300389120. Its totient is φ = 316927776.

The previous prime is 663655043. The next prime is 663655067. The reversal of 663655064 is 460556366.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663655067) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 142517 + ... + 147099.

It is an arithmetic number, because the mean of its divisors is an integer number (40637160).

Almost surely, 2^663655064 is an apocalyptic number.

It is an amenable number.

663655064 is a deficient number, since it is larger than the sum of its proper divisors (636734056).

663655064 is a wasteful number, since it uses less digits than its factorization.

663655064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5399 (or 5395 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 41.

The square root of 663655064 is about 25761.5035275506. The cubic root of 663655064 is about 872.2630403323.

The spelling of 663655064 in words is "six hundred sixty-three million, six hundred fifty-five thousand, sixty-four".