663223636 has 12 divisors (see below), whose sum is σ = 1162450912. Its totient is φ = 331094808.

The previous prime is 663223621. The next prime is 663223663. The reversal of 663223636 is 636322366.

It is a junction number, because it is equal to n+sod(n) for n = 663223595 and 663223604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 126360 + ... + 131503.

Almost surely, 2^663223636 is an apocalyptic number.

It is an amenable number.

663223636 is a deficient number, since it is larger than the sum of its proper divisors (499227276).

663223636 is a wasteful number, since it uses less digits than its factorization.

663223636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258510 (or 258508 counting only the distinct ones).

The product of its digits is 139968, while the sum is 37.

The square root of 663223636 is about 25753.1286643002. The cubic root of 663223636 is about 872.0739861613.

The spelling of 663223636 in words is "six hundred sixty-three million, two hundred twenty-three thousand, six hundred thirty-six".