99888866 has 16 divisors (see below), whose sum is σ = 186805440.
Its totient is φ = 38917680.
The previous prime is 99888857. The next prime is 99888869. The reversal of 99888866 is 66888899.
It is a happy number.
99888866 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 a junction number, because it is equal to n+sod(n) for n = 99888799 and 99888808.
It is not an unprimeable number, because it can be changed into a prime (99888869) 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, 324161 + ... + 324468.
It is an arithmetic number, because the mean of its divisors is an integer number (11675340).
Almost surely, 299888866 is an apocalyptic number.
99888866 is a deficient number, since it is larger than the sum of its proper divisors (86916574).
99888866 is a wasteful number, since it uses less digits than its factorization.
99888866 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 648649.
The product of its digits is 11943936, while the sum is 62.
The square root of 99888866 is about 9994.4417552958.
The cubic root of 99888866 is about 463.9868735139.
The spelling of 99888866 in words is "ninety-nine million, eight hundred eighty-eight thousand, eight hundred sixty-six".