13005665 has 8 divisors (see below), whose sum is σ = 15871680. Its totient is φ = 10227952.

The previous prime is 13005637. The next prime is 13005673. The reversal of 13005665 is 56650031.

13005665 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 a cyclic number.

It is not a de Polignac number, because 13005665 - 2¹⁴ = 12989281 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21749 + ... + 22338.

It is an arithmetic number, because the mean of its divisors is an integer number (1983960).

Almost surely, 2^13005665 is an apocalyptic number.

It is an amenable number.

13005665 is a deficient number, since it is larger than the sum of its proper divisors (2866015).

13005665 is an equidigital number, since it uses as much as digits as its factorization.

13005665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44151.

The product of its (nonzero) digits is 2700, while the sum is 26.

The square root of 13005665 is about 3606.3367840511. The cubic root of 13005665 is about 235.1676184557.

Adding to 13005665 its reverse (56650031), we get a palindrome (69655696).

The spelling of 13005665 in words is "thirteen million, five thousand, six hundred sixty-five".