999999000665 has 16 divisors (see below), whose sum is σ = 1372061930880. Its totient is φ = 685396235520.

The previous prime is 999999000599. The next prime is 999999000667. The reversal of 999999000665 is 566000999999.

It is not a de Polignac number, because 999999000665 - 2²² = 999994806361 is a prime.

It is not an unprimeable number, because it can be changed into a prime (999999000667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6535055 + ... + 6686324.

It is an arithmetic number, because the mean of its divisors is an integer number (85753870680).

Almost surely, 2^999999000665 is an apocalyptic number.

It is an amenable number.

999999000665 is a deficient number, since it is larger than the sum of its proper divisors (372062930215).

999999000665 is a wasteful number, since it uses less digits than its factorization.

999999000665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13223552.

The product of its (nonzero) digits is 95659380, while the sum is 71.

The spelling of 999999000665 in words is "nine hundred ninety-nine billion, nine hundred ninety-nine million, six hundred sixty-five", and thus it is an aban number.