12666171 has 32 divisors (see below), whose sum is σ = 20256768. Its totient is φ = 6888960.

The previous prime is 12666167. The next prime is 12666191. The reversal of 12666171 is 17166621.

It is not a de Polignac number, because 12666171 - 2² = 12666167 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12666131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 40311 + ... + 40623.

It is an arithmetic number, because the mean of its divisors is an integer number (633024).

Almost surely, 2^12666171 is an apocalyptic number.

12666171 is a deficient number, since it is larger than the sum of its proper divisors (7590597).

12666171 is a wasteful number, since it uses less digits than its factorization.

12666171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411.

The product of its digits is 3024, while the sum is 30.

The square root of 12666171 is about 3558.9564481741. The cubic root of 12666171 is about 233.1033145931.

The spelling of 12666171 in words is "twelve million, six hundred sixty-six thousand, one hundred seventy-one".