13163665 has 16 divisors (see below), whose sum is σ = 16324560. Its totient is φ = 10183680.

The previous prime is 13163653. The next prime is 13163669. The reversal of 13163665 is 56636131.

13163665 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 603729 + 12559936 = 777^2 + 3544^2 .

It is not a de Polignac number, because 13163665 - 2⁷ = 13163537 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13163669) 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 15 ways as a sum of consecutive naturals, for example, 31981 + ... + 32389.

It is an arithmetic number, because the mean of its divisors is an integer number (1020285).

Almost surely, 2^13163665 is an apocalyptic number.

It is an amenable number.

13163665 is a deficient number, since it is larger than the sum of its proper divisors (3160895).

13163665 is a wasteful number, since it uses less digits than its factorization.

13163665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 612.

The product of its digits is 9720, while the sum is 31.

The square root of 13163665 is about 3628.1765392549. The cubic root of 13163665 is about 236.1161032188.

Adding to 13163665 its reverse (56636131), we get a palindrome (69799796).

The spelling of 13163665 in words is "thirteen million, one hundred sixty-three thousand, six hundred sixty-five".