13866037861 has 4 divisors (see below), whose sum is σ = 14932656172. Its totient is φ = 12799419552.

The previous prime is 13866037847. The next prime is 13866037891. The reversal of 13866037861 is 16873066831.

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

It can be written as a sum of positive squares in 2 ways, for example, as 6598475361 + 7267562500 = 81231^2 + 85250^2 .

It is a cyclic number.

It is not a de Polignac number, because 13866037861 - 2⁹ = 13866037349 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 (13866037841) 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, 533309136 + ... + 533309161.

It is an arithmetic number, because the mean of its divisors is an integer number (3733164043).

Almost surely, 2^13866037861 is an apocalyptic number.

It is an amenable number.

13866037861 is a deficient number, since it is larger than the sum of its proper divisors (1066618311).

13866037861 is a wasteful number, since it uses less digits than its factorization.

13866037861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1066618310.

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

The spelling of 13866037861 in words is "thirteen billion, eight hundred sixty-six million, thirty-seven thousand, eight hundred sixty-one".