The KM3NeT neutrino telescope is currently under construction in the Mediterranean sea. The modular design of the detectors means data taking has started with partial detectors. With two detector configurations, KM3NeT is both searching for astrophysical neutrino sources with the KM3NeT/ARCA detectors, and measuring neutrino properties via atmospheric neutrino oscillations with KM3NeT/ORCA. In this talk, I will present the latest results of the KM3NeT atmospheric neutrino oscillation analyses and discuss the 220 PeV neutrino event observed by KM3NeT.