Can you replace the question mark with the correct number? 6 30 870 756030 ?

Question

Can you replace the question mark with the correct letter?
6 + 6 + 6 = N
7 + 7 + 7 = E
8 + 8 + 8 = R
0 + 0 + 0 = ?

Answer 1

571,580,604,870

(756030)^2-756030=**********

Comments

You can also do
756030*756029