There are 36C6 ways of selecting 6 numbers between 1 and 36, leaving 30 numbers.
If we continue along these lines we add together the components:
36C6+30C6+24C6+18C6+12C6+6C6=2,695,652.
The question doesn’t say what’s required, but I have assumed it is: how many ways are there of dividing the numbers 1 to 36 into groups of 6?