668166898 has 8 divisors (see below), whose sum is σ = 1145428992. Its totient is φ = 286357236.

The previous prime is 668166893. The next prime is 668166913. The reversal of 668166898 is 898661866.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (668166893) 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, 23863090 + ... + 23863117.

It is an arithmetic number, because the mean of its divisors is an integer number (143178624).

Almost surely, 2^668166898 is an apocalyptic number.

668166898 is a deficient number, since it is larger than the sum of its proper divisors (477262094).

668166898 is a wasteful number, since it uses less digits than its factorization.

668166898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47726216.

The product of its digits is 5971968, while the sum is 58.

The square root of 668166898 is about 25848.9245037390. The cubic root of 668166898 is about 874.2352602020.

The spelling of 668166898 in words is "six hundred sixty-eight million, one hundred sixty-six thousand, eight hundred ninety-eight".