16866866866837 has 16 divisors (see below), whose sum is σ = 18209690524480. Its totient is φ = 15530529002112.

The previous prime is 16866866866813. The next prime is 16866866866891. The reversal of 16866866866837 is 73866866866861.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16866866866837 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16866866866237) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 115768678 + ... + 115914280.

It is an arithmetic number, because the mean of its divisors is an integer number (1138105657780).

Almost surely, 2^{16866866866837} is an apocalyptic number.

It is an amenable number.

16866866866837 is a deficient number, since it is larger than the sum of its proper divisors (1342823657643).

16866866866837 is a wasteful number, since it uses less digits than its factorization.

16866866866837 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167812.

The product of its digits is 24078974976, while the sum is 85.

The spelling of 16866866866837 in words is "sixteen trillion, eight hundred sixty-six billion, eight hundred sixty-six million, eight hundred sixty-six thousand, eight hundred thirty-seven".