Il numero romano MCMLXVIII nel sistema decimale vale: 1968.
MCMLXVIII in latino si scrive mille nongenti sexaginta octo,
mentre in italiano millenovecentosessantotto.
MCMXLIX, MCML, MCMLI, MCMLII, MCMLIII, MCMLIV, MCMLV, MCMLVI, MCMLVII, MCMLVIII, MCMLIX, MCMLX, MCMLXI, MCMLXII, MCMLXIII, MCMLXIV, MCMLXV, MCMLXVI, MCMLXVII, MCMLXIX, MCMLXX, MCMLXXI, MCMLXXII, MCMLXXIII, MCMLXXIV, MCMLXXV, MCMLXXVI, MCMLXXVII, MCMLXXVIII, MCMLXXIX, MCMLXXX, MCMLXXXI, MCMLXXXII, MCMLXXXIII, MCMLXXXIV, MCMLXXXV, MCMLXXXVI, MCMLXXXVII