12166671 has 20 divisors (see below), whose sum is σ = 17908760. Its totient is φ = 7347120.

The previous prime is 12166667. The next prime is 12166681. The reversal of 12166671 is 17666121.

It is not a de Polignac number, because 12166671 - 2² = 12166667 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 (12166681) 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 19 ways as a sum of consecutive naturals, for example, 43785 + ... + 44061.

It is an arithmetic number, because the mean of its divisors is an integer number (895438).

Almost surely, 2^12166671 is an apocalyptic number.

12166671 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12166671 is a deficient number, since it is larger than the sum of its proper divisors (5742089).

12166671 is an frugal number, since it uses more digits than its factorization.

12166671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324 (or 291 counting only the distinct ones).

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

The square root of 12166671 is about 3488.0755439067. The cubic root of 12166671 is about 229.9979268874.

It can be divided in two parts, 1216 and 6671, that added together give a palindrome (7887).

The spelling of 12166671 in words is "twelve million, one hundred sixty-six thousand, six hundred seventy-one".