Lewis Short
sescentÄes (less correctly sexc-)
* Num. adv. [sescenti], six hundred times: sescenties HS.,six hundred times a hundred thousand, sixty millions of sesterces,Cic. Att. 4, 16 C, 14; so, sestertium sescenties,Plin. Ep. 2, 20, 13: sescenties vicies,Lampr. Commod. 15 (in Plaut. Men. 5, 4, 8, the true read. is sescentos).
Charlton T. Lewis, Charles Short, A Latin Dictionary