999145866 has 16 divisors (see below), whose sum is σ = 2022368544. Its totient is φ = 329035824.

The previous prime is 999145843. The next prime is 999145871. The reversal of 999145866 is 668541999.

999145866 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 1002661 + ... + 1003656.

It is an arithmetic number, because the mean of its divisors is an integer number (126398034).

Almost surely, 2^999145866 is an apocalyptic number.

999145866 is an abundant number, since it is smaller than the sum of its proper divisors (1023222678).

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

999145866 is a wasteful number, since it uses less digits than its factorization.

999145866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2006405.

The product of its digits is 4199040, while the sum is 57.

The square root of 999145866 is about 31609.2686723372. The cubic root of 999145866 is about 999.7152075676.

The spelling of 999145866 in words is "nine hundred ninety-nine million, one hundred forty-five thousand, eight hundred sixty-six".