13666786141 has 4 divisors (see below), whose sum is σ = 13668305500. Its totient is φ = 13665266784.

The previous prime is 13666786121. The next prime is 13666786171. The reversal of 13666786141 is 14168766631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14168766631 = 593 ⋅23893367.

It can be written as a sum of positive squares in 2 ways, for example, as 6685515225 + 6981270916 = 81765^2 + 83554^2 .

It is a cyclic number.

It is not a de Polignac number, because 13666786141 - 2⁵ = 13666786109 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 (13666786121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 746106 + ... + 764203.

It is an arithmetic number, because the mean of its divisors is an integer number (3417076375).

Almost surely, 2^13666786141 is an apocalyptic number.

It is an amenable number.

13666786141 is a deficient number, since it is larger than the sum of its proper divisors (1519359).

13666786141 is an equidigital number, since it uses as much as digits as its factorization.

13666786141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1519358.

The product of its digits is 870912, while the sum is 49.

The spelling of 13666786141 in words is "thirteen billion, six hundred sixty-six million, seven hundred eighty-six thousand, one hundred forty-one".