What is the Roman numeral representation for 1666?

To determine the Roman numeral representation of 1666, we break it down into its constituent parts based on Roman numeral values.

The number 1666 can be decomposed as follows:

• 1000 is represented by the letter "M".

• 600 can be represented by "DC" (500 for D and 100 for C, summing to 600).

• 60 is represented by "LX" (50 for L and 10 for X, summing to 60).

• 6 is represented by "VI" (5 for V and 1 for I, summing to 6).

When you combine these values together, you get:

• M (1000)

• DC (600)

• LX (60)

• VI (6)

So, when combined, it reads MDCLXVI, which encapsulates 1666 entirely in Roman numeral format.

This comprehensive breakdown shows how individual components come together to form the complete numeral. Thus, the correct choice accurately reflects this representation.