Step 1: Divide the number into separate digits:
66319 => 6 6 3 1 9
Step 2: Calculate the distance between each digit and the next (the last digit with the first):
6 to 6 = 0
6 to 3 = 3
3 to 1 = 2
1 to 9 = 8
9 to 6 = 3
Step 3: Combine the filters to a string:
0 3 2 8 3 = 03283