663702898 has 4 divisors (see below), whose sum is σ = 995554350. Its totient is φ = 331851448.

The previous prime is 663702887. The next prime is 663702947. The reversal of 663702898 is 898207366.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 639230089 + 24472809 = 25283^2 + 4947^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 165925723 + ... + 165925726.

Almost surely, 2^663702898 is an apocalyptic number.

663702898 is a deficient number, since it is larger than the sum of its proper divisors (331851452).

663702898 is a wasteful number, since it uses less digits than its factorization.

663702898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331851451.

The product of its (nonzero) digits is 870912, while the sum is 49.

The square root of 663702898 is about 25762.4319116034. The cubic root of 663702898 is about 872.2839964134.

The spelling of 663702898 in words is "six hundred sixty-three million, seven hundred two thousand, eight hundred ninety-eight".