999666113 has 8 divisors (see below), whose sum is σ = 1060117632. Its totient is φ = 939397696.

The previous prime is 999666103. The next prime is 999666119. The reversal of 999666113 is 311666999.

It is a happy number.

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

It is not a de Polignac number, because 999666113 - 2⁴ = 999666097 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (999666119) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34445 + ... + 56442.

It is an arithmetic number, because the mean of its divisors is an integer number (132514704).

Almost surely, 2^999666113 is an apocalyptic number.

It is an amenable number.

999666113 is a deficient number, since it is larger than the sum of its proper divisors (60451519).

999666113 is a wasteful number, since it uses less digits than its factorization.

999666113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91551.

The product of its digits is 472392, while the sum is 50.

The square root of 999666113 is about 31617.4969439391. The cubic root of 999666113 is about 999.8886919443. Note that the first 3 decimals are identical.

The spelling of 999666113 in words is "nine hundred ninety-nine million, six hundred sixty-six thousand, one hundred thirteen".