663539863 has 8 divisors (see below), whose sum is σ = 758576000. Its totient is φ = 568564920.

The previous prime is 663539861. The next prime is 663539867. The reversal of 663539863 is 368935366.

663539863 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 663539863 - 2¹ = 663539861 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663539861) 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, 10948 + ... + 38038.

It is an arithmetic number, because the mean of its divisors is an integer number (94822000).

Almost surely, 2^663539863 is an apocalyptic number.

663539863 is a deficient number, since it is larger than the sum of its proper divisors (95036137).

663539863 is a wasteful number, since it uses less digits than its factorization.

663539863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30597.

The product of its digits is 2099520, while the sum is 49.

The square root of 663539863 is about 25759.2675167599. The cubic root of 663539863 is about 872.2125666275.

The spelling of 663539863 in words is "six hundred sixty-three million, five hundred thirty-nine thousand, eight hundred sixty-three".