668422862 has 4 divisors (see below), whose sum is σ = 1002634296. Its totient is φ = 334211430.

The previous prime is 668422823. The next prime is 668422873. The reversal of 668422862 is 268224866.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 167105714 + ... + 167105717.

It is an arithmetic number, because the mean of its divisors is an integer number (250658574).

Almost surely, 2^668422862 is an apocalyptic number.

668422862 is a deficient number, since it is larger than the sum of its proper divisors (334211434).

668422862 is a wasteful number, since it uses less digits than its factorization.

668422862 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334211433.

The product of its digits is 442368, while the sum is 44.

The square root of 668422862 is about 25853.8751834227. The cubic root of 668422862 is about 874.3468811090.

The spelling of 668422862 in words is "six hundred sixty-eight million, four hundred twenty-two thousand, eight hundred sixty-two".