Il numero romano MCMLXXVII nel sistema decimale vale: 1977.
MCMLXXVII in latino si scrive mille nongenti septuaginta septem,
mentre in italiano millenovecentosettantasette.
MCMLVIII, MCMLIX, MCMLX, MCMLXI, MCMLXII, MCMLXIII, MCMLXIV, MCMLXV, MCMLXVI, MCMLXVII, MCMLXVIII, MCMLXIX, MCMLXX, MCMLXXI, MCMLXXII, MCMLXXIII, MCMLXXIV, MCMLXXV, MCMLXXVI, MCMLXXVIII, MCMLXXIX, MCMLXXX, MCMLXXXI, MCMLXXXII, MCMLXXXIII, MCMLXXXIV, MCMLXXXV, MCMLXXXVI, MCMLXXXVII, MCMLXXXVIII, MCMLXXXIX, MCMXC, MCMXCI, MCMXCII, MCMXCIII, MCMXCIV, MCMXCV, MCMXCVI