# 6721

## 6,721 is an odd composite number composed of three prime numbers multiplied together.

What does the number 6721 look like?

This visualization shows the relationship between its 3 prime factors (large circles) and 8 divisors.

6721 is an odd composite number. It is composed of three distinct prime numbers multiplied together. It has a total of eight divisors.

## Prime factorization of 6721:

### 11 × 13 × 47

See below for interesting mathematical facts about the number 6721 from the Numbermatics database.

### Names of 6721

• Cardinal: 6721 can be written as Six thousand, seven hundred twenty-one.

### Scientific notation

• Scientific notation: 6.721 × 103

### Factors of 6721

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 3
• Sum of prime factors: 71

### Divisors of 6721

• Number of divisors d(n): 8
• Complete list of divisors:
• Sum of all divisors σ(n): 8064
• Sum of proper divisors (its aliquot sum) s(n): 1343
• 6721 is a deficient number, because the sum of its proper divisors (1343) is less than itself. Its deficiency is 5378

### Bases of 6721

• Binary: 11010010000012
• Base-36: 56P

### Squares and roots of 6721

• 6721 squared (67212) is 45171841
• 6721 cubed (67213) is 303599943361
• The square root of 6721 is 81.9817052763
• The cube root of 6721 is 18.8717119253

### Scales and comparisons

How big is 6721?
• 6,721 seconds is equal to 1 hour, 52 minutes, 1 second.
• To count from 1 to 6,721 would take you about fifty-two minutes.

This is a very rough estimate, based on a speaking rate of half a second every third order of magnitude. If you speak quickly, you could probably say any randomly-chosen number between one and a thousand in around half a second. Very big numbers obviously take longer to say, so we add half a second for every extra x1000. (We do not count involuntary pauses, bathroom breaks or the necessity of sleep in our calculation!)

• A cube with a volume of 6721 cubic inches would be around 1.6 feet tall.

### Recreational maths with 6721

• 6721 backwards is 1276
• The number of decimal digits it has is: 4
• The sum of 6721's digits is 16
• More coming soon!