13666613 has 8 divisors (see below), whose sum is σ = 14100480. Its totient is φ = 13238800.

The previous prime is 13666607. The next prime is 13666661. The reversal of 13666613 is 31666631.

13666613 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13666613 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13666613.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13666603) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3308 + ... + 6186.

It is an arithmetic number, because the mean of its divisors is an integer number (1762560).

Almost surely, 2^13666613 is an apocalyptic number.

It is an amenable number.

13666613 is a deficient number, since it is larger than the sum of its proper divisors (433867).

13666613 is a wasteful number, since it uses less digits than its factorization.

13666613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3027.

The product of its digits is 11664, while the sum is 32.

The square root of 13666613 is about 3696.8382436888. The cubic root of 13666613 is about 239.0857170525.

The spelling of 13666613 in words is "thirteen million, six hundred sixty-six thousand, six hundred thirteen".