668533368 has 16 divisors (see below), whose sum is σ = 1671333480. Its totient is φ = 222844448.

The previous prime is 668533367. The next prime is 668533391. The reversal of 668533368 is 863335866.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668533367) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13927755 + ... + 13927802.

Almost surely, 2^668533368 is an apocalyptic number.

It is an amenable number.

668533368 is an abundant number, since it is smaller than the sum of its proper divisors (1002800112).

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

668533368 is a wasteful number, since it uses less digits than its factorization.

668533368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27855566 (or 27855562 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 48.

The square root of 668533368 is about 25856.0122215318. The cubic root of 668533368 is about 874.3950618131.

The spelling of 668533368 in words is "six hundred sixty-eight million, five hundred thirty-three thousand, three hundred sixty-eight".