13665063 has 4 divisors (see below), whose sum is σ = 18220088. Its totient is φ = 9110040.

The previous prime is 13665053. The next prime is 13665083. The reversal of 13665063 is 36056631.

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

It is not a de Polignac number, because 13665063 - 2⁶ = 13664999 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 13665063.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13665023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2277508 + ... + 2277513.

It is an arithmetic number, because the mean of its divisors is an integer number (4555022).

Almost surely, 2^13665063 is an apocalyptic number.

13665063 is a deficient number, since it is larger than the sum of its proper divisors (4555025).

13665063 is an equidigital number, since it uses as much as digits as its factorization.

13665063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4555024.

The product of its (nonzero) digits is 9720, while the sum is 30.

The square root of 13665063 is about 3696.6285991427. The cubic root of 13665063 is about 239.0766780689.

The spelling of 13665063 in words is "thirteen million, six hundred sixty-five thousand, sixty-three".