13366261 has 4 divisors (see below), whose sum is σ = 13373932. Its totient is φ = 13358592.

The previous prime is 13366201. The next prime is 13366271. The reversal of 13366261 is 16266331.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 16266331 = 17 ⋅956843.

It can be written as a sum of positive squares in 2 ways, for example, as 1874161 + 11492100 = 1369^2 + 3390^2 .

It is a cyclic number.

It is not a de Polignac number, because 13366261 - 2¹⁹ = 12841973 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 (13366201) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 181 + ... + 5173.

It is an arithmetic number, because the mean of its divisors is an integer number (3343483).

Almost surely, 2^13366261 is an apocalyptic number.

It is an amenable number.

13366261 is a deficient number, since it is larger than the sum of its proper divisors (7671).

13366261 is an equidigital number, since it uses as much as digits as its factorization.

13366261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7670.

The product of its digits is 3888, while the sum is 28.

The square root of 13366261 is about 3655.9897428740. The cubic root of 13366261 is about 237.3212601607.

The spelling of 13366261 in words is "thirteen million, three hundred sixty-six thousand, two hundred sixty-one".