9911881166 has 16 divisors (see below), whose sum is σ = 16221144240. Its totient is φ = 4504927680.

The previous prime is 9911881129. The next prime is 9911881201. The reversal of 9911881166 is 6611881199.

9911881166 is a strobogrammatic number because it is the same when read upside-down.

It is a zygodrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 274010 + ... + 308066.

It is an arithmetic number, because the mean of its divisors is an integer number (1013821515).

Almost surely, 2^9911881166 is an apocalyptic number.

9911881166 is a deficient number, since it is larger than the sum of its proper divisors (6309263074).

9911881166 is a wasteful number, since it uses less digits than its factorization.

9911881166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47299.

The product of its digits is 186624, while the sum is 50.

The square root of 9911881166 is about 99558.4309137102. The cubic root of 9911881166 is about 2148.0878015900.

The spelling of 9911881166 in words is "nine billion, nine hundred eleven million, eight hundred eighty-one thousand, one hundred sixty-six".