663998492 has 12 divisors (see below), whose sum is σ = 1162363776. Its totient is φ = 331894560.

The previous prime is 663998459. The next prime is 663998501. The reversal of 663998492 is 294899366.

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, 10913 + ... + 38040.

It is an arithmetic number, because the mean of its divisors is an integer number (96863648).

Almost surely, 2^663998492 is an apocalyptic number.

It is an amenable number.

663998492 is a deficient number, since it is larger than the sum of its proper divisors (498365284).

663998492 is a wasteful number, since it uses less digits than its factorization.

663998492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52348 (or 52346 counting only the distinct ones).

The product of its digits is 5038848, while the sum is 56.

The square root of 663998492 is about 25768.1681925588. The cubic root of 663998492 is about 872.4134738484.

The spelling of 663998492 in words is "six hundred sixty-three million, nine hundred ninety-eight thousand, four hundred ninety-two".