13661682857 has 8 divisors (see below), whose sum is σ = 14446344192. Its totient is φ = 12898519200.

The previous prime is 13661682829. The next prime is 13661682863. The reversal of 13661682857 is 75828616631.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13661682857 - 2²⁸ = 13393247401 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13661682799 and 13661682808.

It is not an unprimeable number, because it can be changed into a prime (13661682257) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5373113 + ... + 5375654.

It is an arithmetic number, because the mean of its divisors is an integer number (1805793024).

Almost surely, 2^13661682857 is an apocalyptic number.

It is an amenable number.

13661682857 is a deficient number, since it is larger than the sum of its proper divisors (784661335).

13661682857 is a wasteful number, since it uses less digits than its factorization.

13661682857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10748839.

The product of its digits is 2903040, while the sum is 53.

The spelling of 13661682857 in words is "thirteen billion, six hundred sixty-one million, six hundred eighty-two thousand, eight hundred fifty-seven".