# 668

## 668 is an even composite number composed of two prime numbers multiplied together.

What does the number 668 look like?

This visualization shows the relationship between its 2 prime factors (large circles) and 6 divisors.

668 is an even composite number. It is composed of two distinct prime numbers multiplied together. It has a total of six divisors.

## Prime factorization of 668:

### 22 × 167

(2 × 2 × 167)

See below for interesting mathematical facts about the number 668 from the Numbermatics database.

### Names of 668

• Cardinal: 668 can be written as Six hundred sixty-eight.

### Scientific notation

• Scientific notation: 6.68 × 102

### Factors of 668

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 3
• Sum of prime factors: 169

### Divisors of 668

• Number of divisors d(n): 6
• Complete list of divisors:
• Sum of all divisors σ(n): 1176
• Sum of proper divisors (its aliquot sum) s(n): 508
• 668 is a deficient number, because the sum of its proper divisors (508) is less than itself. Its deficiency is 160

### Bases of 668

• Binary: 10100111002
• Base-36: IK

### Squares and roots of 668

• 668 squared (6682) is 446224
• 668 cubed (6683) is 298077632
• The square root of 668 is 25.8456959667
• The cube root of 668 is 8.7416246389

### Scales and comparisons

How big is 668?
• 668 seconds is equal to 11 minutes, 8 seconds.
• To count from 1 to 668 would take you about five 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 668 cubic inches would be around 0.7 feet tall.

### Recreational maths with 668

• 668 backwards is 866
• The number of decimal digits it has is: 3
• The sum of 668's digits is 20
• More coming soon!

MLA style:
"Number 668 - Facts about the integer". Numbermatics.com. 2023. Web. 30 March 2023.

APA style:
Numbermatics. (2023). Number 668 - Facts about the integer. Retrieved 30 March 2023, from https://numbermatics.com/n/668/

Chicago style:
Numbermatics. 2023. "Number 668 - Facts about the integer". https://numbermatics.com/n/668/

The information we have on file for 668 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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