13331665 has 8 divisors (see below), whose sum is σ = 16148160. Its totient is φ = 10565232.

The previous prime is 13331663. The next prime is 13331671. The reversal of 13331665 is 56613331.

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 13331665 - 2¹ = 13331663 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13331663) 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, 11925 + ... + 12994.

It is an arithmetic number, because the mean of its divisors is an integer number (2018520).

Almost surely, 2^13331665 is an apocalyptic number.

It is an amenable number.

13331665 is a deficient number, since it is larger than the sum of its proper divisors (2816495).

13331665 is a wasteful number, since it uses less digits than its factorization.

13331665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25031.

The product of its digits is 4860, while the sum is 28.

The square root of 13331665 is about 3651.2552636046. The cubic root of 13331665 is about 237.1163297474.

Adding to 13331665 its reverse (56613331), we get a palindrome (69944996).

The spelling of 13331665 in words is "thirteen million, three hundred thirty-one thousand, six hundred sixty-five".