12166771 has 2 divisors, whose sum is σ = 12166772. Its totient is φ = 12166770.

The previous prime is 12166769. The next prime is 12166799. The reversal of 12166771 is 17766121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12166771 - 2¹ = 12166769 is a prime.

Together with 12166769, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (12166171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6083385 + 6083386.

It is an arithmetic number, because the mean of its divisors is an integer number (6083386).

Almost surely, 2^12166771 is an apocalyptic number.

12166771 is a deficient number, since it is larger than the sum of its proper divisors (1).

12166771 is an equidigital number, since it uses as much as digits as its factorization.

12166771 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3528, while the sum is 31.

The square root of 12166771 is about 3488.0898784292. The cubic root of 12166771 is about 229.9985570168.

The spelling of 12166771 in words is "twelve million, one hundred sixty-six thousand, seven hundred seventy-one".