12166553 has 16 divisors (see below), whose sum is σ = 14400000. Its totient is φ = 10273536.

The previous prime is 12166547. The next prime is 12166579. The reversal of 12166553 is 35566121.

It is not a de Polignac number, because 12166553 - 2⁴ = 12166537 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12166513) 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 15 ways as a sum of consecutive naturals, for example, 26873 + ... + 27321.

It is an arithmetic number, because the mean of its divisors is an integer number (900000).

Almost surely, 2^12166553 is an apocalyptic number.

It is an amenable number.

12166553 is a deficient number, since it is larger than the sum of its proper divisors (2233447).

12166553 is an frugal number, since it uses more digits than its factorization.

12166553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 549 (or 535 counting only the distinct ones).

The product of its digits is 5400, while the sum is 29.

The square root of 12166553 is about 3488.0586290944. The cubic root of 12166553 is about 229.9971833303.

The spelling of 12166553 in words is "twelve million, one hundred sixty-six thousand, five hundred fifty-three".