899619666 has 16 divisors (see below), whose sum is σ = 1962806688. Its totient is φ = 272612000.

The previous prime is 899619647. The next prime is 899619667. The reversal of 899619666 is 666916998.

It is not an unprimeable number, because it can be changed into a prime (899619667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6815235 + ... + 6815366.

It is an arithmetic number, because the mean of its divisors is an integer number (122675418).

Almost surely, 2^899619666 is an apocalyptic number.

899619666 is an abundant number, since it is smaller than the sum of its proper divisors (1063187022).

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

899619666 is a wasteful number, since it uses less digits than its factorization.

899619666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13630617.

The product of its digits is 7558272, while the sum is 60.

The square root of 899619666 is about 29993.6604301642. The cubic root of 899619666 is about 965.3533623173.

The spelling of 899619666 in words is "eight hundred ninety-nine million, six hundred nineteen thousand, six hundred sixty-six".