8666973218 has 8 divisors (see below), whose sum is σ = 13765192812. Its totient is φ = 4078575616.

The previous prime is 8666973187. The next prime is 8666973233. The reversal of 8666973218 is 8123796668.

It can be written as a sum of positive squares in 2 ways, for example, as 8398439449 + 268533769 = 91643^2 + 16387^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 127455455 + ... + 127455522.

Almost surely, 2^8666973218 is an apocalyptic number.

8666973218 is a deficient number, since it is larger than the sum of its proper divisors (5098219594).

8666973218 is a wasteful number, since it uses less digits than its factorization.

8666973218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254910996.

The product of its digits is 5225472, while the sum is 56.

The square root of 8666973218 is about 93096.5800553382. The cubic root of 8666973218 is about 2054.1042674633.

The spelling of 8666973218 in words is "eight billion, six hundred sixty-six million, nine hundred seventy-three thousand, two hundred eighteen".