66666+4634734635щ38638535369

It looks like there's a typo in your equation. The "щ" character is not a number or a recognized operator in mathematics, so I cannot process the equation as it stands.

If you want to add the numbers 66666 and 4634734635, the result is:

66666 + 4634734635 = 4634801301

If "щ38638535369" is meant to be another number you want to add to the total, please correct the typo, remove any non-numeric characters, and I will assist you with the correct calculation.