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Olympians could never die of old age. They were shown to be invulnerable to photon beams, for example, when K9 Mark II used them against two Olympians, who were unaffected. They were also able to survive in the vacuum of space without the need of oxygen.
Olympians were able to summon different types of energies when needed. Prometheus was able to use an electric wave on the TARDIS which made it travel to Olympus. Zeus was able to appear in a gigantic form amongst clouds and emit massive amounts of electricity at the TARDIS. However the ship was unharmed by his attack. (COMIC: The Life Bringer!)