668203960 has 16 divisors (see below), whose sum is σ = 1503459000. Its totient is φ = 267281568.

The previous prime is 668203927. The next prime is 668204063. The reversal of 668203960 is 69302866.

It is a Harshad number since it is a multiple of its sum of digits (40), and also a Moran number because the ratio is a prime number: 16705099 = 668203960 / (6 + 6 + 8 + 2 + 0 + 3 + 9 + 6 + 0).

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, 8352510 + ... + 8352589.

Almost surely, 2^668203960 is an apocalyptic number.

It is an amenable number.

668203960 is an abundant number, since it is smaller than the sum of its proper divisors (835255040).

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

668203960 is a wasteful number, since it uses less digits than its factorization.

668203960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16705110 (or 16705106 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 40.

The square root of 668203960 is about 25849.6413901625. The cubic root of 668203960 is about 874.2514239820.

The spelling of 668203960 in words is "six hundred sixty-eight million, two hundred three thousand, nine hundred sixty".