13665 is digitally balanced in base 2, 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 an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 13665.
213665 is an apocalyptic number.
13665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.
It is an amenable number.
13665 is an equidigital number, since it uses as much as digits as its factorization.
13665 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 919.
The square root of 13665 is about 116.8973909033. The cubic root of 13665 is about 23.9076310664.
The spelling of 13665 in words is "thirteen thousand, six hundred sixty-five".