12166999 has 16 divisors (see below), whose sum is σ = 13575520. Its totient is φ = 10834560.

The previous prime is 12166997. The next prime is 12167009. The reversal of 12166999 is 99966121.

It is a Cunningham number, because it is equal to 230³-1.

It is a cyclic number.

It is not a de Polignac number, because 12166999 - 2¹ = 12166997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12166991) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53017 + ... + 53245.

It is an arithmetic number, because the mean of its divisors is an integer number (848470).

Almost surely, 2^12166999 is an apocalyptic number.

12166999 is a deficient number, since it is larger than the sum of its proper divisors (1408521).

12166999 is a wasteful number, since it uses less digits than its factorization.

12166999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370.

The product of its digits is 52488, while the sum is 43.

The square root of 12166999 is about 3488.1225609201. The cubic root of 12166999 is about 229.9999936988. Note that the first 5 decimals are identical.

The spelling of 12166999 in words is "twelve million, one hundred sixty-six thousand, nine hundred ninety-nine".