13386766861 has 4 divisors (see below), whose sum is σ = 14416518172. Its totient is φ = 12357015552.

The previous prime is 13386766849. The next prime is 13386766873. The reversal of 13386766861 is 16866768331.

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

It is an interprime number because it is at equal distance from previous prime (13386766849) and next prime (13386766873).

It can be written as a sum of positive squares in 2 ways, for example, as 4886848836 + 8499918025 = 69906^2 + 92195^2 .

It is a cyclic number.

It is not a de Polignac number, because 13386766861 - 2¹⁵ = 13386734093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13386766891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 514875636 + ... + 514875661.

It is an arithmetic number, because the mean of its divisors is an integer number (3604129543).

Almost surely, 2^13386766861 is an apocalyptic number.

It is an amenable number.

13386766861 is a deficient number, since it is larger than the sum of its proper divisors (1029751311).

13386766861 is a wasteful number, since it uses less digits than its factorization.

13386766861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1029751310.

The product of its digits is 5225472, while the sum is 55.

The spelling of 13386766861 in words is "thirteen billion, three hundred eighty-six million, seven hundred sixty-six thousand, eight hundred sixty-one".