13406665 has 8 divisors (see below), whose sum is σ = 16107840. Its totient is φ = 10712112.

The previous prime is 13406651. The next prime is 13406711. The reversal of 13406665 is 56660431.

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-13406665 is a prime.

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, 6196 + ... + 8074.

It is an arithmetic number, because the mean of its divisors is an integer number (2013480).

Almost surely, 2^13406665 is an apocalyptic number.

It is an amenable number.

13406665 is a deficient number, since it is larger than the sum of its proper divisors (2701175).

13406665 is a wasteful number, since it uses less digits than its factorization.

13406665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3311.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 13406665 is about 3661.5112999962. The cubic root of 13406665 is about 237.5601472779.

The spelling of 13406665 in words is "thirteen million, four hundred six thousand, six hundred sixty-five".