663806402 has 16 divisors (see below), whose sum is σ = 1138762752. Its totient is φ = 284286240.

The previous prime is 663806371. The next prime is 663806413. The reversal of 663806402 is 204608366.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4478 + ... + 36710.

It is an arithmetic number, because the mean of its divisors is an integer number (71172672).

Almost surely, 2^663806402 is an apocalyptic number.

663806402 is a deficient number, since it is larger than the sum of its proper divisors (474956350).

663806402 is a wasteful number, since it uses less digits than its factorization.

663806402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33713.

The product of its (nonzero) digits is 41472, while the sum is 35.

The square root of 663806402 is about 25764.4406498569. The cubic root of 663806402 is about 872.3293380816.

The spelling of 663806402 in words is "six hundred sixty-three million, eight hundred six thousand, four hundred two".