12166655 has 16 divisors (see below), whose sum is σ = 15565824. Its totient is φ = 9108000.

The previous prime is 12166607. The next prime is 12166667. The reversal of 12166655 is 55666121.

It is not a de Polignac number, because 12166655 - 2¹⁰ = 12165631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4280 + ... + 6530.

It is an arithmetic number, because the mean of its divisors is an integer number (972864).

Almost surely, 2^12166655 is an apocalyptic number.

12166655 is a deficient number, since it is larger than the sum of its proper divisors (3399169).

12166655 is a wasteful number, since it uses less digits than its factorization.

12166655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2326.

The product of its digits is 10800, while the sum is 32.

The square root of 12166655 is about 3488.0732503776. The cubic root of 12166655 is about 229.9978260664.

It can be divided in two parts, 12166 and 655, that added together give a palindrome (12821).

The spelling of 12166655 in words is "twelve million, one hundred sixty-six thousand, six hundred fifty-five".