12166499 has 4 divisors (see below), whose sum is σ = 12173664. Its totient is φ = 12159336.

The previous prime is 12166493. The next prime is 12166501. The reversal of 12166499 is 99466121.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 12166499 - 2⁸ = 12166243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12166493) 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, 569 + ... + 4965.

It is an arithmetic number, because the mean of its divisors is an integer number (3043416).

Almost surely, 2^12166499 is an apocalyptic number.

12166499 is a deficient number, since it is larger than the sum of its proper divisors (7165).

12166499 is an equidigital number, since it uses as much as digits as its factorization.

12166499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7164.

The product of its digits is 23328, while the sum is 38.

The square root of 12166499 is about 3488.0508883902. The cubic root of 12166499 is about 229.9968430569.

The spelling of 12166499 in words is "twelve million, one hundred sixty-six thousand, four hundred ninety-nine".