99888888888866 has 36 divisors (see below), whose sum is σ = 191581464013254. Its totient is φ = 38917748913120.

The previous prime is 99888888888853. The next prime is 99888888888889. The reversal of 99888888888866 is 66888888888899.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 51420071466841 + 48468817422025 = 7170779^2 + 6961955^2 .

99888888888866 is a strobogrammatic number because it is the same when read upside-down.

It is a nialpdrome in base 10.

It is a zygodrome in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 4211865731 + ... + 4211889446.

Almost surely, 2^{99888888888866} is an apocalyptic number.

99888888888866 is a deficient number, since it is larger than the sum of its proper divisors (91692575124388).

99888888888866 is a wasteful number, since it uses less digits than its factorization.

99888888888866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8423755215 (or 8423755197 counting only the distinct ones).

The product of its digits is 3131031158784, while the sum is 110.

The spelling of 99888888888866 in words is "ninety-nine trillion, eight hundred eighty-eight billion, eight hundred eighty-eight million, eight hundred eighty-eight thousand, eight hundred sixty-six".