13166645 has 8 divisors (see below), whose sum is σ = 16016856. Its totient is φ = 10388736.

The previous prime is 13166633. The next prime is 13166669. The reversal of 13166645 is 54666131.

It can be written as a sum of positive squares in 4 ways, for example, as 4268356 + 8898289 = 2066^2 + 2983^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13166645 - 2⁶ = 13166581 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 (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17672 + ... + 18401.

It is an arithmetic number, because the mean of its divisors is an integer number (2002107).

Almost surely, 2^13166645 is an apocalyptic number.

It is an amenable number.

13166645 is a deficient number, since it is larger than the sum of its proper divisors (2850211).

13166645 is an equidigital number, since it uses as much as digits as its factorization.

13166645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36151.

The product of its digits is 12960, while the sum is 32.

The square root of 13166645 is about 3628.5871906294. The cubic root of 13166645 is about 236.1339192525.

The spelling of 13166645 in words is "thirteen million, one hundred sixty-six thousand, six hundred forty-five".