9988118866 has 16 divisors (see below), whose sum is σ = 16506021888. Its totient is φ = 4495102000.

The previous prime is 9988118863. The next prime is 9988118887. The reversal of 9988118866 is 6688118899.

9988118866 is a strobogrammatic number because it is the same when read upside-down.

It is a zygodrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 9988118798 and 9988118807.

It is not an unprimeable number, because it can be changed into a prime (9988118863) 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, 2245330 + ... + 2249773.

It is an arithmetic number, because the mean of its divisors is an integer number (1031626368).

Almost surely, 2^9988118866 is an apocalyptic number.

9988118866 is a deficient number, since it is larger than the sum of its proper divisors (6517903022).

9988118866 is a wasteful number, since it uses less digits than its factorization.

9988118866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4495217.

The product of its digits is 11943936, while the sum is 64.

The square root of 9988118866 is about 99940.5766743418. The cubic root of 9988118866 is about 2153.5811143194.

The spelling of 9988118866 in words is "nine billion, nine hundred eighty-eight million, one hundred eighteen thousand, eight hundred sixty-six".