What type of internet usage and router would i need to host a dedicated 64 player gaming server?
The Router you have will likely need to be a business level one. Netgear or Draytek do affordable ADSL Router/Firewall products that will handle the connections. Your biggest issue will be upstream bandwidth. If you have ADSL then the average upstream speed is between 300-800kps. If you live in a good ADSL2+ area then you may get up to 1.5MB but not much more than that. Depending upon the bandwidth requirements of the game, if all 64 players are online at the same time it may not even be possible without hosting the server within a datacentre with a dedicated 10MB-100MB uplink.