13665055 has 4 divisors (see below), whose sum is σ = 16398072. Its totient is φ = 10932040.

The previous prime is 13665053. The next prime is 13665083. The reversal of 13665055 is 55056631.

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

It is not a de Polignac number, because 13665055 - 2¹ = 13665053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13665053) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1366501 + ... + 1366510.

It is an arithmetic number, because the mean of its divisors is an integer number (4099518).

Almost surely, 2^13665055 is an apocalyptic number.

13665055 is a deficient number, since it is larger than the sum of its proper divisors (2733017).

13665055 is an equidigital number, since it uses as much as digits as its factorization.

13665055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2733016.

The product of its (nonzero) digits is 13500, while the sum is 31.

The square root of 13665055 is about 3696.6275170755. The cubic root of 13665055 is about 239.0766314144.

The spelling of 13665055 in words is "thirteen million, six hundred sixty-five thousand, fifty-five".