8999668556 has 24 divisors (see below), whose sum is σ = 16707929616. Its totient is φ = 4226992640.

The previous prime is 8999668547. The next prime is 8999668589. The reversal of 8999668556 is 6558669998.

It is a self number, because there is not a number n which added to its sum of digits gives 8999668556.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91586 + ... + 162441.

It is an arithmetic number, because the mean of its divisors is an integer number (696163734).

Almost surely, 2^8999668556 is an apocalyptic number.

It is an amenable number.

8999668556 is a deficient number, since it is larger than the sum of its proper divisors (7708261060).

8999668556 is a wasteful number, since it uses less digits than its factorization.

8999668556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254569 (or 254567 counting only the distinct ones).

The product of its digits is 251942400, while the sum is 71.

The square root of 8999668556 is about 94866.5829257068. The cubic root of 8999668556 is about 2080.0582882458.

The spelling of 8999668556 in words is "eight billion, nine hundred ninety-nine million, six hundred sixty-eight thousand, five hundred fifty-six".