8866686721 has 8 divisors (see below), whose sum is σ = 8914062080. Its totient is φ = 8819379792.

The previous prime is 8866686709. The next prime is 8866686767. The reversal of 8866686721 is 1276866688.

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

It is a cyclic number.

It is not a de Polignac number, because 8866686721 - 2²⁷ = 8732468993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8866686701) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 254110 + ... + 286888.

It is an arithmetic number, because the mean of its divisors is an integer number (1114257760).

Almost surely, 2^8866686721 is an apocalyptic number.

It is an amenable number.

8866686721 is a deficient number, since it is larger than the sum of its proper divisors (47375359).

8866686721 is a wasteful number, since it uses less digits than its factorization.

8866686721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34215.

The product of its digits is 9289728, while the sum is 58.

The square root of 8866686721 is about 94163.0857661324. The cubic root of 8866686721 is about 2069.7622169242.

The spelling of 8866686721 in words is "eight billion, eight hundred sixty-six million, six hundred eighty-six thousand, seven hundred twenty-one".