# 6561

## 6,561 is an odd composite number. It is composed of a single prime number multiplied by itself seven times.

What does the number 6561 look like?

This visualization shows the relationship between its 1 prime factors (large circles) and 9 divisors.

6561 is an odd composite number. It is composed of one distinct prime number multiplied by itself seven times. It has a total of nine divisors.

## Prime factorization of 6561:

### 38

(3 × 3 × 3 × 3 × 3 × 3 × 3 × 3)

See below for interesting mathematical facts about the number 6561 from the Numbermatics database.

### Names of 6561

• Cardinal: 6561 can be written as Six thousand, five hundred sixty-one.

### Scientific notation

• Scientific notation: 6.561 × 103

### Factors of 6561

• Number of distinct prime factors ω(n): 1
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 3

### Divisors of 6561

• Number of divisors d(n): 9
• Complete list of divisors:
• Sum of all divisors σ(n): 9841
• Sum of proper divisors (its aliquot sum) s(n): 3280
• 6561 is a deficient number, because the sum of its proper divisors (3280) is less than itself. Its deficiency is 3281

### Bases of 6561

• Binary: 11001101000012
• Base-36: 529

### Squares and roots of 6561

• 6561 squared (65612) is 43046721
• 6561 cubed (65613) is 282429536481
• 6561 is a perfect square number. Its square root is 81
• The cube root of 6561 is 18.7207544077

### Scales and comparisons

How big is 6561?
• 6,561 seconds is equal to 1 hour, 49 minutes, 21 seconds.
• To count from 1 to 6,561 would take you about forty-nine 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 6561 cubic inches would be around 1.6 feet tall.

### Recreational maths with 6561

• 6561 backwards is 1656
• The number of decimal digits it has is: 4
• The sum of 6561's digits is 18
• More coming soon!

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Chicago style:
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The information we have on file for 6561 includes mathematical data and numerical statistics calculated using standard algorithms and methods. We are adding more all the time. If there are any features you would like to see, please contact us. Information provided for educational use, intellectual curiosity and fun!

Keywords: Divisors of 6561, math, Factors of 6561, curriculum, school, college, exams, university, Prime factorization of 6561, STEM, science, technology, engineering, physics, economics, calculator, six thousand, five hundred sixty-one.

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