8168668618 has 24 divisors (see below), whose sum is σ = 13527081540. Its totient is φ = 3696792000.

The previous prime is 8168668597. The next prime is 8168668621.

8168668618 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 2 ways, for example, as 7769188449 + 399480169 = 88143^2 + 19987^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18283 + ... + 129118.

Almost surely, 2^8168668618 is an apocalyptic number.

8168668618 is a deficient number, since it is larger than the sum of its proper divisors (5358412922).

8168668618 is a wasteful number, since it uses less digits than its factorization.

8168668618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147654 (or 147643 counting only the distinct ones).

The product of its digits is 5308416, while the sum is 58.

The square root of 8168668618 is about 90380.6871958827. The cubic root of 8168668618 is about 2013.9580775831.

The spelling of 8168668618 in words is "eight billion, one hundred sixty-eight million, six hundred sixty-eight thousand, six hundred eighteen".