8663220872 has 16 divisors (see below), whose sum is σ = 16246043100. Its totient is φ = 4330942720.

The previous prime is 8663220857. The next prime is 8663220887. The reversal of 8663220872 is 2780223668.

It is an interprime number because it is at equal distance from previous prime (8663220857) and next prime (8663220887).

It can be written as a sum of positive squares in 2 ways, for example, as 6526377796 + 2136843076 = 80786^2 + 46226^2 .

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, 25997 + ... + 134172.

Almost surely, 2^8663220872 is an apocalyptic number.

It is an amenable number.

8663220872 is a deficient number, since it is larger than the sum of its proper divisors (7582822228).

8663220872 is a wasteful number, since it uses less digits than its factorization.

8663220872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166936 (or 166932 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 44.

The square root of 8663220872 is about 93076.4248991118. The cubic root of 8663220872 is about 2053.8077847755.

The spelling of 8663220872 in words is "eight billion, six hundred sixty-three million, two hundred twenty thousand, eight hundred seventy-two".