663658863 has 8 divisors (see below), whose sum is σ = 1011289728. Its totient is φ = 379233624.

The previous prime is 663658799. The next prime is 663658867. The reversal of 663658863 is 368856366.

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

It is not a de Polignac number, because 663658863 - 2⁶ = 663658799 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663658867) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 15801381 + ... + 15801422.

It is an arithmetic number, because the mean of its divisors is an integer number (126411216).

Almost surely, 2^663658863 is an apocalyptic number.

663658863 is a deficient number, since it is larger than the sum of its proper divisors (347630865).

663658863 is a wasteful number, since it uses less digits than its factorization.

663658863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31602813.

The product of its digits is 3732480, while the sum is 51.

The square root of 663658863 is about 25761.5772614955. The cubic root of 663658863 is about 872.2647047115.

It can be divided in two parts, 663 and 658863, that added together give a triangular number (659526 = T₁₁₄₈).

The spelling of 663658863 in words is "six hundred sixty-three million, six hundred fifty-eight thousand, eight hundred sixty-three".