Yes, Valdivia's 1960 is the biggest ever recorded. It's hard to even imagine the magnitude of such an earthquake. My parents both lived that earthquake and VERY close to the epicenter and what they tell about it and the devastation it caused it's terrifying.
And yes, the tsunami caused some destruction even as far as Hawaii.
But everything is good here. Really, a 6.6 (though this one was quite superficial) does pretty much nothing over here. The buildings are made to resist much bigger earthquakes or else the whole country would be on the ground every few years. That being said it was quite the movement; I was cooking and quickly cut the gas It was probably the stronger I've felt since 2010.
I've felt MANY earthquakes. If you live in Chile you'll be inevitably dealing with them. That said, most are small and we don't even use the Spanish word for earthquake (= terremoto) for anything under 7, or pretty much anything that doesn't cause any destruction. We say "temblor" (... as if a "shake"?).
But I felt the February 27 2010 one. It was huge, actually the second biggest in Chile only after Valdivia's. This one was 8.8.
I was in Osorno, some 500 km south of the epicenter and it felt quite powerful even there. it was 3 AM... I felt the house - no exaggerating - moving from side to side. But luckily nothing happened there. Closer to the epicenter and even in Santiago it was a different story. It was a very destructive earthquake, even if not as much as 1960's.