Il numero romano MMMMCMLXI nel sistema decimale vale: 4961.
MMMMCMLXI in latino si scrive quattuor milia nongenti sexaginta unus,
mentre in italiano quattromilanovecentosessantuno.
MMMMCMXLII, MMMMCMXLIII, MMMMCMXLIV, MMMMCMXLV, MMMMCMXLVI, MMMMCMXLVII, MMMMCMXLVIII, MMMMCMXLIX, MMMMCML, MMMMCMLI, MMMMCMLII, MMMMCMLIII, MMMMCMLIV, MMMMCMLV, MMMMCMLVI, MMMMCMLVII, MMMMCMLVIII, MMMMCMLIX, MMMMCMLX, MMMMCMLXII, MMMMCMLXIII, MMMMCMLXIV, MMMMCMLXV, MMMMCMLXVI, MMMMCMLXVII, MMMMCMLXVIII, MMMMCMLXIX, MMMMCMLXX, MMMMCMLXXI, MMMMCMLXXII, MMMMCMLXXIII, MMMMCMLXXIV, MMMMCMLXXV, MMMMCMLXXVI, MMMMCMLXXVII, MMMMCMLXXVIII, MMMMCMLXXIX, MMMMCMLXXX