667,421 in words
667,421
six hundred and sixty-seven thousand four hundred and twenty-one
667,421 is written six hundred and sixty-seven thousand four hundred and twenty-one.
Ways to write it
- As an ordinal
- six hundred and sixty-seven thousand four hundred and twenty-first
- Expanded form
- 600,000 + 60,000 + 7,000 + 400 + 20 + 1
Place value
| Place | Digit | Value |
|---|---|---|
| hundred thousands | 6 | 600,000 |
| ten thousands | 6 | 60,000 |
| thousands | 7 | 7,000 |
| hundreds | 4 | 400 |
| tens | 2 | 20 |
| ones | 1 | 1 |
Number facts
- Even or odd
- Odd
- Prime or composite
- Prime
- Factors
- 1 and 667,421 (2 factors)
- First 10 multiples
- 667,421, 1,334,842, 2,002,263, 2,669,684, 3,337,105, 4,004,526, 4,671,947, 5,339,368, 6,006,789, 6,674,210
- Square
- 667,421 × 667,421 = 445,450,791,241
- Square root
- ≈ 816.96
- Sum of the digits
- 6 + 6 + 7 + 4 + 2 + 1 = 26
- Rounded to the nearest 10
- 667,420
- Rounded to the nearest 100
- 667,400
- Rounded to the nearest 1000
- 667,000
- Number before
- 667,420
- Number after
- 667,422
- In binary
10100010111100011101
Quick check
What number comes just after 667,421?
Show the answer
667,422
Is 667,421 even or odd?
Show the answer
Odd
What is 667,421 + 10?
Show the answer
667,431
Practise with a game
Factors, Multiples & Primes
Multiples, factors, prime numbers, square numbers and prime factors.
Number Patterns
Find the missing number in a sequence.Frequently asked questions
How do you write 667,421 in words?
667,421 is written "six hundred and sixty-seven thousand four hundred and twenty-one".
Is 667,421 a prime number?
Yes. 667,421 is a prime number: its only factors are 1 and 667,421.
What are the factors of 667,421?
The factors of 667,421 are 1 and 667,421.