Step 1: Divide the number into separate digits:
64258 => 6 4 2 5 8
Step 2: Calculate the distance between each digit and the next (the last digit with the first):
6 to 4 = 2
4 to 2 = 2
2 to 5 = 3
5 to 8 = 3
8 to 6 = 2
Step 3: Combine the filters to a string:
2 2 3 3 2 = 22332