12166613 has 4 divisors (see below), whose sum is σ = 12292140. Its totient is φ = 12041088.

The previous prime is 12166607. The next prime is 12166667. The reversal of 12166613 is 31666121.

12166613 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3912484 + 8254129 = 1978^2 + 2873^2 .

It is a cyclic number.

It is not a de Polignac number, because 12166613 - 2¹⁰ = 12165589 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 (12166013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62618 + ... + 62811.

It is an arithmetic number, because the mean of its divisors is an integer number (3073035).

Almost surely, 2^12166613 is an apocalyptic number.

It is an amenable number.

12166613 is a deficient number, since it is larger than the sum of its proper divisors (125527).

12166613 is an equidigital number, since it uses as much as digits as its factorization.

12166613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125526.

The product of its digits is 1296, while the sum is 26.

The square root of 12166613 is about 3488.0672298567. The cubic root of 12166613 is about 229.9975614108.

It can be divided in two parts, 1216 and 6613, that multiplied together give a palindrome (8041408).

The spelling of 12166613 in words is "twelve million, one hundred sixty-six thousand, six hundred thirteen".