Step 1: Divide the number into separate digits:
17475 => 1 7 4 7 5
Step 2: Calculate the distance between each digit and the next (the last digit with the first):
1 to 7 = 6
7 to 4 = 3
4 to 7 = 3
7 to 5 = 2
5 to 1 = 4
Step 3: Combine the filters to a string:
6 3 3 2 4 = 63324