671 in words
671
six hundred seventy-one
671 is written six hundred seventy-one.
Ways to write it
- As an ordinal
- six hundred seventy-first
- Roman numeral
- DCLXXI
- Expanded form
- 600 + 70 + 1
Place value
| Place | Digit | Value |
|---|---|---|
| hundreds | 6 | 600 |
| tens | 7 | 70 |
| ones | 1 | 1 |
Number facts
- Even or odd
- Odd
- Prime or composite
- Composite
- Factors
- 1, 11, 61 and 671 (4 factors)
- First 10 multiples
- 671, 1,342, 2,013, 2,684, 3,355, 4,026, 4,697, 5,368, 6,039, 6,710
- Square
- 671 × 671 = 450,241
- Square root
- ≈ 25.90
- Sum of the digits
- 6 + 7 + 1 = 14
- Rounded to the nearest 10
- 670
- Rounded to the nearest 100
- 700
- Number before
- 670
- Number after
- 672
- In binary
1010011111
Quick check
What number comes just after 671?
Show the answer
672
Is 671 even or odd?
Show the answer
Odd
What is 671 + 10?
Show the answer
681
Practise 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 671 in words?
671 is written "six hundred seventy-one".
Is 671 a prime number?
No. 671 is a composite number, because it has more than two factors.
What are the factors of 671?
The factors of 671 are 1, 11, 61 and 671.
How do you write 671 in Roman numerals?
671 in Roman numerals is DCLXXI.