8666456680 has 64 divisors (see below), whose sum is σ = 22356599040. Its totient is φ = 2961833472.

The previous prime is 8666456573. The next prime is 8666456699. The reversal of 8666456680 is 866546668.

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, 38197 + ... + 137083.

It is an arithmetic number, because the mean of its divisors is an integer number (349321860).

Almost surely, 2^8666456680 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8666456680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11178299520).

8666456680 is an abundant number, since it is smaller than the sum of its proper divisors (13690142360).

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

8666456680 is a wasteful number, since it uses less digits than its factorization.

8666456680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99218 (or 99214 counting only the distinct ones).

The product of its (nonzero) digits is 9953280, while the sum is 55.

The square root of 8666456680 is about 93093.8058089796. The cubic root of 8666456680 is about 2054.0634595225.

It can be divided in two parts, 8666456 and 680, that added together give a square (8667136 = 2944²).

The spelling of 8666456680 in words is "eight billion, six hundred sixty-six million, four hundred fifty-six thousand, six hundred eighty".