999890966 has 8 divisors (see below), whose sum is σ = 1501652520. Its totient is φ = 499340128.

The previous prime is 999890963. The next prime is 999890981. The reversal of 999890966 is 669098999.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999890963) 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 3 ways as a sum of consecutive naturals, for example, 300611 + ... + 303918.

It is an arithmetic number, because the mean of its divisors is an integer number (187706565).

Almost surely, 2^999890966 is an apocalyptic number.

999890966 is a deficient number, since it is larger than the sum of its proper divisors (501761554).

999890966 is a wasteful number, since it uses less digits than its factorization.

999890966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 605358.

The product of its (nonzero) digits is 17006112, while the sum is 65.

The square root of 999890966 is about 31621.0525757762. The cubic root of 999890966 is about 999.9636540123.

The spelling of 999890966 in words is "nine hundred ninety-nine million, eight hundred ninety thousand, nine hundred sixty-six".