663983199 has 24 divisors (see below), whose sum is σ = 1061903232. Its totient is φ = 396403920.

The previous prime is 663983183. The next prime is 663983209. The reversal of 663983199 is 991389366.

663983199 is a `hidden beast` number, since 66 + 398 + 3 + 199 = 666.

It is not a de Polignac number, because 663983199 - 2⁴ = 663983183 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663983179) 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 23 ways as a sum of consecutive naturals, for example, 43419 + ... + 56684.

It is an arithmetic number, because the mean of its divisors is an integer number (44245968).

Almost surely, 2^663983199 is an apocalyptic number.

663983199 is a deficient number, since it is larger than the sum of its proper divisors (397920033).

663983199 is a wasteful number, since it uses less digits than its factorization.

663983199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100187 (or 100184 counting only the distinct ones).

The product of its digits is 1889568, while the sum is 54.

The square root of 663983199 is about 25767.8714487635. The cubic root of 663983199 is about 872.4067760814.

The spelling of 663983199 in words is "six hundred sixty-three million, nine hundred eighty-three thousand, one hundred ninety-nine".