# 166

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

What does the number 166 look like?

This visualization shows the relationship between its 2 prime factors (large circles) and 4 divisors.

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

## Prime factorization of 166:

### 2 × 83

See below for interesting mathematical facts about the number 166 from the Numbermatics database.

### Names of 166

• Cardinal: 166 can be written as One hundred sixty-six.

### Scientific notation

• Scientific notation: 1.66 × 102

### Factors of 166

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 2
• Sum of prime factors: 85

### Divisors of 166

• Number of divisors d(n): 4
• Complete list of divisors:
• Sum of all divisors σ(n): 252
• Sum of proper divisors (its aliquot sum) s(n): 86
• 166 is a deficient number, because the sum of its proper divisors (86) is less than itself. Its deficiency is 80

### Bases of 166

• Binary: 101001102
• Base-36: 4M

### Squares and roots of 166

• 166 squared (1662) is 27556
• 166 cubed (1663) is 4574296
• The square root of 166 is 12.8840987267
• The cube root of 166 is 5.4958646601

### Scales and comparisons

How big is 166?
• 166 seconds is equal to 2 minutes, 46 seconds.
• To count from 1 to 166 would take you about twenty-three seconds.

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 166 cubic inches would be around 0.5 feet tall.

### Recreational maths with 166

• 166 backwards is 661
• The number of decimal digits it has is: 3
• The sum of 166's digits is 13
• More coming soon!