663665163 has 12 divisors (see below), whose sum is σ = 1029358440. Its totient is φ = 379237152.

The previous prime is 663665137. The next prime is 663665201. The reversal of 663665163 is 361566366.

It is not a de Polignac number, because 663665163 - 2⁸ = 663664907 is a prime.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (663665113) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2257218 + ... + 2257511.

It is an arithmetic number, because the mean of its divisors is an integer number (85779870).

Almost surely, 2^663665163 is an apocalyptic number.

663665163 is a deficient number, since it is larger than the sum of its proper divisors (365693277).

663665163 is a wasteful number, since it uses less digits than its factorization.

663665163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4514746 (or 4514739 counting only the distinct ones).

The product of its digits is 349920, while the sum is 42.

The square root of 663665163 is about 25761.6995363272. The cubic root of 663665163 is about 872.2674647893.

The spelling of 663665163 in words is "six hundred sixty-three million, six hundred sixty-five thousand, one hundred sixty-three".