680 in words
680
six hundred eighty
680 is written six hundred eighty.
Ways to write it
- As an ordinal
- six hundred eightieth
- Roman numeral
- DCLXXX
- Expanded form
- 600 + 80
Place value
| Place | Digit | Value |
|---|---|---|
| hundreds | 6 | 600 |
| tens | 8 | 80 |
| ones | 0 | 0 |
Number facts
- Even or odd
- Even
- Prime or composite
- Composite
- Factors
- 1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 136, 170, 340 and 680 (16 factors)
- First 10 multiples
- 680, 1,360, 2,040, 2,720, 3,400, 4,080, 4,760, 5,440, 6,120, 6,800
- Square
- 680 × 680 = 462,400
- Square root
- ≈ 26.08
- Sum of the digits
- 6 + 8 + 0 = 14
- Rounded to the nearest 10
- 680
- Rounded to the nearest 100
- 700
- Number before
- 679
- Number after
- 681
- In binary
1010101000
Quick check
What number comes just after 680?
Show the answer
681
Is 680 even or odd?
Show the answer
Even
What is 680 + 10?
Show the answer
690
Practice with a game
Factors, Multiples & Primes
Multiples, factors, prime numbers, square numbers and prime factors.
Roman Numerals
Read and write Roman numerals from I to 3,999.Frequently asked questions
How do you write 680 in words?
680 is written "six hundred eighty".
Is 680 a prime number?
No. 680 is a composite number, because it has more than two factors.
What are the factors of 680?
The factors of 680 are 1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 136, 170, 340 and 680.
How do you write 680 in Roman numerals?
680 in Roman numerals is DCLXXX.