13644266 has 4 divisors (see below), whose sum is σ = 20466402. Its totient is φ = 6822132.

The previous prime is 13644259. The next prime is 13644269. The reversal of 13644266 is 66244631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66244631 = 17 ⋅3896743.

It can be written as a sum of positive squares in only one way, i.e., 9954025 + 3690241 = 3155^2 + 1921^2 .

It is not an unprimeable number, because it can be changed into a prime (13644269) by changing a digit.

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 as a sum of consecutive naturals, namely, 3411065 + ... + 3411068.

Almost surely, 2^13644266 is an apocalyptic number.

13644266 is a deficient number, since it is larger than the sum of its proper divisors (6822136).

13644266 is an equidigital number, since it uses as much as digits as its factorization.

13644266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6822135.

The product of its digits is 20736, while the sum is 32.

The square root of 13644266 is about 3693.8145595035. The cubic root of 13644266 is about 238.9553320700.

Adding to 13644266 its reverse (66244631), we get a palindrome (79888897).

The spelling of 13644266 in words is "thirteen million, six hundred forty-four thousand, two hundred sixty-six".