13660811 has 4 divisors (see below), whose sum is σ = 13765224. Its totient is φ = 13556400.

The previous prime is 13660793. The next prime is 13660847. The reversal of 13660811 is 11806631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11806631 = 1423 ⋅8297.

It is a cyclic number.

It is not a de Polignac number, because 13660811 - 2¹⁴ = 13644427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13660891) 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 3 ways as a sum of consecutive naturals, for example, 52010 + ... + 52271.

It is an arithmetic number, because the mean of its divisors is an integer number (3441306).

Almost surely, 2^13660811 is an apocalyptic number.

13660811 is a deficient number, since it is larger than the sum of its proper divisors (104413).

13660811 is a wasteful number, since it uses less digits than its factorization.

13660811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104412.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 13660811 is about 3696.0534357609. The cubic root of 13660811 is about 239.0518785860.

The spelling of 13660811 in words is "thirteen million, six hundred sixty thousand, eight hundred eleven".