8821612866 has 32 divisors (see below), whose sum is σ = 20260166400. Its totient is φ = 2532520080.

The previous prime is 8821612781. The next prime is 8821612871. The reversal of 8821612866 is 6682161288.

It is a happy number.

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, 3516136 + ... + 3518643.

It is an arithmetic number, because the mean of its divisors is an integer number (633130200).

Almost surely, 2^8821612866 is an apocalyptic number.

8821612866 is an abundant number, since it is smaller than the sum of its proper divisors (11438553534).

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

8821612866 is a wasteful number, since it uses less digits than its factorization.

8821612866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7034814.

The product of its digits is 442368, while the sum is 48.

The square root of 8821612866 is about 93923.4415148849. The cubic root of 8821612866 is about 2066.2490408935.

The spelling of 8821612866 in words is "eight billion, eight hundred twenty-one million, six hundred twelve thousand, eight hundred sixty-six".