13886665 has 8 divisors (see below), whose sum is σ = 17945928. Its totient is φ = 10254720.

The previous prime is 13886657. The next prime is 13886669. The reversal of 13886665 is 56668831.

It can be written as a sum of positive squares in 4 ways, for example, as 425104 + 13461561 = 652^2 + 3669^2 .

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

It is not a de Polignac number, because 13886665 - 2³ = 13886657 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13886669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106756 + ... + 106885.

It is an arithmetic number, because the mean of its divisors is an integer number (2243241).

Almost surely, 2^13886665 is an apocalyptic number.

It is an amenable number.

13886665 is a deficient number, since it is larger than the sum of its proper divisors (4059263).

13886665 is a wasteful number, since it uses less digits than its factorization.

13886665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213659.

The product of its digits is 207360, while the sum is 43.

The square root of 13886665 is about 3726.4815845513. The cubic root of 13886665 is about 240.3620980886.

The spelling of 13886665 in words is "thirteen million, eight hundred eighty-six thousand, six hundred sixty-five".