Olympians could never die of old age. They were shown to be invulnerable to photon beams, for example, when K9 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)
Olympian technology was very advanced. However, some of their methods appeared primitive. Known transportation included shell-crafts, which could travel through the atmosphere, as well as metal chariots. (COMIC: The Life Bringer)