Step 1: Divide the number into separate digits:
97064 => 9 7 0 6 4
Step 2: Calculate the distance between each digit and the next (the last digit with the first):
9 to 7 = 2
7 to 0 = 7
0 to 6 = 6
6 to 4 = 2
4 to 9 = 5
Step 3: Combine the filters to a string:
2 7 6 2 5 = 27625