For example, getting all the posible numbers (from 1 to 6) in ascendant or descendant order is $\dfrac{2}{6^{6}}$, because the only pisibilities are (1,2,3,4,5,6) and (6,5,4,3,2,1).
But, i don't understand what is the difference when you want to get the six numbers in any order and also, the probability of only getting odd numbers.
Thanks.
HINT
The possile arrangements for the six numbers are simply the permutations that is $6!$