Step 1: Divide the number into separate digits:
93766 => 9 3 7 6 6
Step 2: Calculate the distance between each digit and the next (the last digit with the first):
9 to 3 = 6
3 to 7 = 4
7 to 6 = 1
6 to 6 = 0
6 to 9 = 3
Step 3: Combine the filters to a string:
6 4 1 0 3 = 64103