999166158 has 32 divisors (see below), whose sum is σ = 2240752800. Its totient is φ = 329997888.

The previous prime is 999166127. The next prime is 999166237. The reversal of 999166158 is 851661999.

999166158 is a `hidden beast` number, since 9 + 9 + 9 + 16 + 615 + 8 = 666.

999166158 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×999166158² = 1996666022584961928, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78991 + ... + 90762.

It is an arithmetic number, because the mean of its divisors is an integer number (70023525).

Almost surely, 2^999166158 is an apocalyptic number.

999166158 is an abundant number, since it is smaller than the sum of its proper divisors (1241586642).

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

999166158 is a wasteful number, since it uses less digits than its factorization.

999166158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169873 (or 169867 counting only the distinct ones).

The product of its digits is 1049760, while the sum is 54.

The square root of 999166158 is about 31609.5896525089. The cubic root of 999166158 is about 999.7219753761.

The spelling of 999166158 in words is "nine hundred ninety-nine million, one hundred sixty-six thousand, one hundred fifty-eight".