A million Bitcoins together is counted as an MBTC or MegaBitcoin. Bitcoin has a metric system in place to identify units of Bitcoin. The denominations go as: BTC = 1 BTC daBTC (deca-bitcoin) = 10 BTC hBTC (hector-bitcoin) = 100 BTC kBTC (kilo-bitcoin) = 1000 BTC And lastly MBTC (Megabitcoin) = 1,000,000 BTC