13666339 has 4 divisors (see below), whose sum is σ = 14385640. Its totient is φ = 12947040.

The previous prime is 13666321. The next prime is 13666369. The reversal of 13666339 is 93366631.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13666339 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13666298 and 13666307.

It is not an unprimeable number, because it can be changed into a prime (13666309) 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, 359622 + ... + 359659.

It is an arithmetic number, because the mean of its divisors is an integer number (3596410).

Almost surely, 2^13666339 is an apocalyptic number.

13666339 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

13666339 is a deficient number, since it is larger than the sum of its proper divisors (719301).

13666339 is an equidigital number, since it uses as much as digits as its factorization.

13666339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 719300.

The product of its digits is 52488, while the sum is 37.

The square root of 13666339 is about 3696.8011848083. The cubic root of 13666339 is about 239.0841192432.

The spelling of 13666339 in words is "thirteen million, six hundred sixty-six thousand, three hundred thirty-nine".