help!

We only need to focus on the last digit. 

7^(654321)

note that the last digit repeats 7, 9, 3, 1

654321/4 has a remainder of 1. 

The first digit in the sequence 7, 9, 3, 1 is 7. 

So the answer is 7. 

I hope this helped. :)))

=^._.^=

Hint: Find a pattern!