# 1666

## 1,666 is an even composite number composed of three prime numbers multiplied together.

What does the number 1666 look like?

This visualization shows the relationship between its 3 prime factors (large circles) and 12 divisors.

1666 is an even composite number. It is composed of three distinct prime numbers multiplied together. It has a total of twelve divisors.

## Prime factorization of 1666:

### 2 × 72 × 17

(2 × 7 × 7 × 17)

See below for interesting mathematical facts about the number 1666 from the Numbermatics database.

### Names of 1666

• Cardinal: 1666 can be written as One thousand, six hundred sixty-six.

### Scientific notation

• Scientific notation: 1.666 × 103

### Factors of 1666

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 4
• Sum of prime factors: 26

### Divisors of 1666

• Number of divisors d(n): 12
• Complete list of divisors:
• Sum of all divisors σ(n): 3078
• Sum of proper divisors (its aliquot sum) s(n): 1412
• 1666 is a deficient number, because the sum of its proper divisors (1412) is less than itself. Its deficiency is 254

### Bases of 1666

• Binary: 110100000102
• Base-36: 1AA

### Squares and roots of 1666

• 1666 squared (16662) is 2775556
• 1666 cubed (16663) is 4624076296
• The square root of 1666 is 40.8166632639
• The cube root of 1666 is 11.8547299627

### Scales and comparisons

How big is 1666?
• 1,666 seconds is equal to 27 minutes, 46 seconds.
• To count from 1 to 1,666 would take you about twenty-seven 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 1666 cubic inches would be around 1 feet tall.

### Recreational maths with 1666

• 1666 backwards is 6661
• The number of decimal digits it has is: 4
• The sum of 1666's digits is 19
• More coming soon!

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Chicago style:
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The information we have on file for 1666 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!

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