9911166788 has 12 divisors (see below), whose sum is σ = 17942629740. Its totient is φ = 4784701152.

The previous prime is 9911166779. The next prime is 9911166799. The reversal of 9911166788 is 8876611199.

It can be written as a sum of positive squares in 2 ways, for example, as 6046306564 + 3864860224 = 77758^2 + 62168^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42720431 + ... + 42720662.

It is an arithmetic number, because the mean of its divisors is an integer number (1495219145).

Almost surely, 2^9911166788 is an apocalyptic number.

It is an amenable number.

9911166788 is a deficient number, since it is larger than the sum of its proper divisors (8031462952).

9911166788 is a wasteful number, since it uses less digits than its factorization.

9911166788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85441126 (or 85441124 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 56.

The square root of 9911166788 is about 99554.8431167465. The cubic root of 9911166788 is about 2148.0361940458.

The spelling of 9911166788 in words is "nine billion, nine hundred eleven million, one hundred sixty-six thousand, seven hundred eighty-eight".