9898888888666 has 16 divisors (see below), whose sum is σ = 15100122837600. Its totient is φ = 4865515974448.

The previous prime is 9898888888649. The next prime is 9898888888687. The reversal of 9898888888666 is 6668888888989.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18717021 + ... + 19238623.

It is an arithmetic number, because the mean of its divisors is an integer number (943757677350).

Almost surely, 2^{9898888888666} is an apocalyptic number.

9898888888666 is a deficient number, since it is larger than the sum of its proper divisors (5201233948934).

9898888888666 is a wasteful number, since it uses less digits than its factorization.

9898888888666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 682493.

The product of its digits is 293534171136, while the sum is 100.

The spelling of 9898888888666 in words is "nine trillion, eight hundred ninety-eight billion, eight hundred eighty-eight million, eight hundred eighty-eight thousand, six hundred sixty-six".