8718664220 has 48 divisors (see below), whose sum is σ = 20930101248. Its totient is φ = 2988498240.

The previous prime is 8718664187. The next prime is 8718664249. The reversal of 8718664220 is 224668178.

It is a super-2 number, since 2×8718664220² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1060325 + ... + 1068515.

It is an arithmetic number, because the mean of its divisors is an integer number (436043776).

Almost surely, 2^8718664220 is an apocalyptic number.

It is an amenable number.

8718664220 is an abundant number, since it is smaller than the sum of its proper divisors (12211437028).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8718664220 is a wasteful number, since it uses less digits than its factorization.

8718664220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15810 (or 15808 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 44.

The square root of 8718664220 is about 93373.7876494255. The cubic root of 8718664220 is about 2058.1798277818.

The spelling of 8718664220 in words is "eight billion, seven hundred eighteen million, six hundred sixty-four thousand, two hundred twenty".