Which mountain's summit is the farthest point on Earth's surface from the centre of the planet?

Explication

The planet bulges at the equator, and Chimborazo stands barely a degree and a half south of it, so its 6,263 m summit ends up about two kilometres farther from Earth's centre than Everest's 8,849 m one. Everest still wins the usual contest — it is the highest point above sea level, which is a different question entirely.