number/seˈsenta/
sixty (the cardinal number occurring after fifty-nine and before sixty-one, represented in Roman numerals as LX and in Arabic numerals as 60)
Inherited from Old Spanish sessaenta (“threescore”), from Latin sexāgintā, from Proto-Indo-European *sweḱsḱomt, from earlier *swéḱs-dḱomt (“six-ten”).