8866989021 has 24 divisors (see below), whose sum is σ = 13297382560. Its totient is φ = 5248948320.

The previous prime is 8866989017. The next prime is 8866989023. The reversal of 8866989021 is 1209896688.

It is not a de Polignac number, because 8866989021 - 2² = 8866989017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8866989023) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 268426 + ... + 299643.

Almost surely, 2^8866989021 is an apocalyptic number.

It is an amenable number.

8866989021 is a deficient number, since it is larger than the sum of its proper divisors (4430393539).

8866989021 is a wasteful number, since it uses less digits than its factorization.

8866989021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 568137 (or 568126 counting only the distinct ones).

The product of its (nonzero) digits is 2985984, while the sum is 57.

The square root of 8866989021 is about 94164.6909462353. The cubic root of 8866989021 is about 2069.7857387510.

The spelling of 8866989021 in words is "eight billion, eight hundred sixty-six million, nine hundred eighty-nine thousand, twenty-one".