663356404 has 6 divisors (see below), whose sum is σ = 1160873714. Its totient is φ = 331678200.

The previous prime is 663356389. The next prime is 663356413. The reversal of 663356404 is 404653366.

It can be written as a sum of positive squares in only one way, i.e., 662959504 + 396900 = 25748^2 + 630^2 .

It is a super-2 number, since 2×663356404² = 880083437455622432, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82919547 + ... + 82919554.

Almost surely, 2^663356404 is an apocalyptic number.

It is an amenable number.

663356404 is a deficient number, since it is larger than the sum of its proper divisors (497517310).

663356404 is a wasteful number, since it uses less digits than its factorization.

663356404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165839105 (or 165839103 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 37.

The square root of 663356404 is about 25755.7062415302. The cubic root of 663356404 is about 872.1321745749.

The spelling of 663356404 in words is "six hundred sixty-three million, three hundred fifty-six thousand, four hundred four".