663665063 has 8 divisors (see below), whose sum is σ = 666848208. Its totient is φ = 660489984.

The previous prime is 663665059. The next prime is 663665089. The reversal of 663665063 is 360566366.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 663665063 - 2² = 663665059 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 663665063.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663665963) 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, 214856 + ... + 217922.

It is an arithmetic number, because the mean of its divisors is an integer number (83356026).

Almost surely, 2^663665063 is an apocalyptic number.

663665063 is a deficient number, since it is larger than the sum of its proper divisors (3183145).

663665063 is a wasteful number, since it uses less digits than its factorization.

663665063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4033.

The product of its (nonzero) digits is 349920, while the sum is 41.

The square root of 663665063 is about 25761.6975954614. The cubic root of 663665063 is about 872.2674209787.

The spelling of 663665063 in words is "six hundred sixty-three million, six hundred sixty-five thousand, sixty-three".