Heptacontillion

The heptacontillion is equal to \(10^{3\left(10^{210}\right)+3}\), or \(10^{3\text{ novemsexagintillion }3}\). The term was coined by Jonathan Bowers.

Etymology
The name of this number is based on the suffix "-illion" and the prefix "heptaconta-" (from Greek for 70).