663296868 has 36 divisors (see below), whose sum is σ = 1805642748. Its totient is φ = 204091200.

The previous prime is 663296861. The next prime is 663296869. The reversal of 663296868 is 868692366.

It can be written as a sum of positive squares in 2 ways, for example, as 278823204 + 384473664 = 16698^2 + 19608^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (663296861) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 708183 + ... + 709118.

It is an arithmetic number, because the mean of its divisors is an integer number (50156743).

Almost surely, 2^663296868 is an apocalyptic number.

It is an amenable number.

663296868 is an abundant number, since it is smaller than the sum of its proper divisors (1142345880).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

663296868 is a wasteful number, since it uses less digits than its factorization.

663296868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1417324 (or 1417319 counting only the distinct ones).

The product of its digits is 4478976, while the sum is 54.

The square root of 663296868 is about 25754.5504328847. The cubic root of 663296868 is about 872.1060826107.

The spelling of 663296868 in words is "six hundred sixty-three million, two hundred ninety-six thousand, eight hundred sixty-eight".