13662811 has 4 divisors (see below), whose sum is σ = 13675000. Its totient is φ = 13650624.

The previous prime is 13662797. The next prime is 13662821. The reversal of 13662811 is 11826631.

13662811 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 13662811 - 2¹¹ = 13660763 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 13662811.

It is not an unprimeable number, because it can be changed into a prime (13662821) 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 3 ways as a sum of consecutive naturals, for example, 4221 + ... + 6718.

It is an arithmetic number, because the mean of its divisors is an integer number (3418750).

Almost surely, 2^13662811 is an apocalyptic number.

13662811 is a deficient number, since it is larger than the sum of its proper divisors (12189).

13662811 is a wasteful number, since it uses less digits than its factorization.

13662811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12188.

The product of its digits is 1728, while the sum is 28.

The square root of 13662811 is about 3696.3239847178. The cubic root of 13662811 is about 239.0635440825.

The spelling of 13662811 in words is "thirteen million, six hundred sixty-two thousand, eight hundred eleven".