8666836656 has 80 divisors (see below), whose sum is σ = 23158993920. Its totient is φ = 2790017280.

The previous prime is 8666836649. The next prime is 8666836669. The reversal of 8666836656 is 6566386668.

It is a super-2 number, since 2×8666836656² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 8666836656.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 751671 + ... + 763113.

It is an arithmetic number, because the mean of its divisors is an integer number (289487424).

Almost surely, 2^8666836656 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 8666836656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11579496960).

8666836656 is an abundant number, since it is smaller than the sum of its proper divisors (14492157264).

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

8666836656 is a wasteful number, since it uses less digits than its factorization.

8666836656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11994 (or 11988 counting only the distinct ones).

The product of its digits is 44789760, while the sum is 60.

The square root of 8666836656 is about 93095.8466098247. The cubic root of 8666836656 is about 2054.0934788426.

The spelling of 8666836656 in words is "eight billion, six hundred sixty-six million, eight hundred thirty-six thousand, six hundred fifty-six".