12166216 has 8 divisors (see below), whose sum is σ = 22811670. Its totient is φ = 6083104.

The previous prime is 12166207. The next prime is 12166243. The reversal of 12166216 is 61266121.

It can be written as a sum of positive squares in only one way, i.e., 12040900 + 125316 = 3470^2 + 354^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 760381 + ... + 760396.

Almost surely, 2^12166216 is an apocalyptic number.

It is an amenable number.

12166216 is a deficient number, since it is larger than the sum of its proper divisors (10645454).

12166216 is a wasteful number, since it uses less digits than its factorization.

12166216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1520783 (or 1520779 counting only the distinct ones).

The product of its digits is 864, while the sum is 25.

The square root of 12166216 is about 3488.0103210856. The cubic root of 12166216 is about 229.9950597553.

The spelling of 12166216 in words is "twelve million, one hundred sixty-six thousand, two hundred sixteen".