16686 ÷ 1 
We want to figure out the number of times 16686 can be divided by 1.

Going ahead to step 1:
1 divided by 1 is 1 with a remainder of 0.
The next digit of our result is 1. 
Result so far: 1.0
If we take 1 away from 1, we end up with 0.
Include the next digit (6) from the dividend after 0, then repeat: 6 / 1

Moving on to step 2:
1 can be fit into 6 6 times, resulting in a remainder of 0.
The number 6 becomes the next digit in our result. 
Result so far: 16.0
If we take 6 away from 6, we end up with 0.
Append the next digit (6) from the dividend to 0 and continue with: 6 / 1

On to step 3:
When dividing 6 by 1, we get 6 with a remainder of 0.
Put 6 as the next digit of the answer. 
Result so far: 166.0
If we take 6 away from 6, we end up with 0.
Append the next digit (8) from the dividend to 0 and continue with: 8 / 1

Advancing to step 4:
When dividing 8 by 1, we get 8 with a remainder of 0.
Record the quotient 8 as the next digit in the result. 
Result so far: 1668.0
The remainder is 0 after subtracting 8 from 8.
Bring next digit (6) of the dividend behind the 0 and repeat the process: 6 / 1

On to step 5:
The number 1 fits into 6 6 times, leaving a remainder of 0.
Write down 6 as next digit of the result. 
Result so far: 16686.0
Deduct 6 from 6 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

On to step 6:
If we divide 0 by 1, we get 0 and a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 16686.0
Subtracting 0 from 0 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 7:
When dividing 0 by 1, we get 0 with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 16686.0
Subtracting 0 from 0 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Our division results in 16686.0 with a remaining 0.0.