668485268 has 24 divisors (see below), whose sum is σ = 1277125920. Its totient is φ = 303636320.

The previous prime is 668485261. The next prime is 668485313. The reversal of 668485268 is 862584866.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668485261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66263 + ... + 75681.

It is an arithmetic number, because the mean of its divisors is an integer number (53213580).

Almost surely, 2^668485268 is an apocalyptic number.

It is an amenable number.

668485268 is a deficient number, since it is larger than the sum of its proper divisors (608640652).

668485268 is a wasteful number, since it uses less digits than its factorization.

668485268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11047 (or 11045 counting only the distinct ones).

The product of its digits is 4423680, while the sum is 53.

The square root of 668485268 is about 25855.0820536312. The cubic root of 668485268 is about 874.3740908274.

The spelling of 668485268 in words is "six hundred sixty-eight million, four hundred eighty-five thousand, two hundred sixty-eight".