13665534 has 16 divisors (see below), whose sum is σ = 27404688. Its totient is φ = 4542912.

The previous prime is 13665523. The next prime is 13665539. The reversal of 13665534 is 43556631.

13665534 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 13665495 and 13665504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13665539) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 487 + ... + 5250.

It is an arithmetic number, because the mean of its divisors is an integer number (1712793).

Almost surely, 2^13665534 is an apocalyptic number.

13665534 is an abundant number, since it is smaller than the sum of its proper divisors (13739154).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13665534 is a wasteful number, since it uses less digits than its factorization.

13665534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6139.

The product of its digits is 32400, while the sum is 33.

The square root of 13665534 is about 3696.6923052913. The cubic root of 13665534 is about 239.0794248259.

The spelling of 13665534 in words is "thirteen million, six hundred sixty-five thousand, five hundred thirty-four".