How to write 77 in Roman numerals
Roman numerals are built place by place, from the largest value to the smallest. For 77 the places are 70 (tens), 7 (ones).
- Write 70 as
LXX. - Write 7 as
VII.
Joined together, LXX + VII gives LXXVII.
77 digit by digit
| Place | Value | Numeral | Rule used |
|---|---|---|---|
| tens | 70 | LXX | the five symbol plus two |
| ones | 7 | VII | the five symbol plus two |
Check LXXVII by reading it back
Reading LXXVII from left to right and adding the pieces: LXX = 70, VII = 7. Together that is 70 + 7 = 77, so LXXVII and 77 match.
Mistakes to avoid with LXXVII
- Never repeat a symbol more than three times in a row. When a fourth would be needed, the subtractive form takes over.
- Only I, X and C may be placed before a larger symbol to subtract, so LXXVII never contains forms such as VX or LC.
- Read LXXVII as one number, not letter by letter: add the values left to right, except where a smaller symbol sits before a larger one.
Facts about the number 77
- 77 is an odd number and composite, with prime factors 7 x 11.
- In binary 77 is
1001101and in hexadecimal it is4D. - Written out, 77 is "seventy-seven".
- The digits of 77 add up to 14.
Where you will see 77 in Roman numerals
Readers find the number 77 expressed as LXXVII in the table of contents for multi volume biographical dictionaries. Editors use Roman numerals for volume designations to keep the organizational structure visually distinct from page counts.
Numbers near 77
FAQ
What is 77 in Roman numerals?
77 is written LXXVII in Roman numerals. It is built from LXX (70), VII (7).
How do you write 77 in lowercase Roman numerals?
Lowercase Roman numerals use the same rules, so 77 is lxxvii. Lowercase is common for page numbers in a book's preface and for outline levels.
How do I convert any number to Roman numerals?
Split the number into thousands, hundreds, tens and ones, write each part with the symbols I, V, X, L, C, D and M, then join them from largest to smallest. Or paste it into the Roman numeral converter, which also converts back.
More roman numerals
- 76 (LXXVI): previous page
- 78 (LXXVIII): next page
- Roman numerals chart: the full list