How many hours is too many??

I was working a brutal schedule in the lab over my summers (65 hour weeks), and it’s really racked up. My total hours for everything (including ECs, volunteering, and research, etc.) on AMCAS comes out to 6700 as a rising senior. Is that too much?

Should I underreport my own hours? I don’t want to sound unbelievable, but I’m also wary of underrepresenting how much I worked.