899818668 has 72 divisors (see below), whose sum is σ = 2606542848. Its totient is φ = 256392288.

The previous prime is 899818607. The next prime is 899818669. The reversal of 899818668 is 866818998.

It is a Harshad number since it is a multiple of its sum of digits (63).

899818668 is a strobogrammatic number because it is the same when read upside-down.

It is not an unprimeable number, because it can be changed into a prime (899818669) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 91855 + ... + 101177.

It is an arithmetic number, because the mean of its divisors is an integer number (36201984).

Almost surely, 2^899818668 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 899818668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1303271424).

899818668 is an abundant number, since it is smaller than the sum of its proper divisors (1706724180).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

899818668 is a wasteful number, since it uses less digits than its factorization.

899818668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9723 (or 9718 counting only the distinct ones).

The product of its digits is 11943936, while the sum is 63.

The square root of 899818668 is about 29996.9776477564. The cubic root of 899818668 is about 965.4245379833.

The spelling of 899818668 in words is "eight hundred ninety-nine million, eight hundred eighteen thousand, six hundred sixty-eight".