# 68

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

What does the number 68 look like?

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

68 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 68:

### 22 × 17

(2 × 2 × 17)

See below for interesting mathematical facts about the number 68 from the Numbermatics database.

### Names of 68

• Cardinal: 68 can be written as Sixty-eight.

### Scientific notation

• Scientific notation: 6.8 × 101

### Factors of 68

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 3
• Sum of prime factors: 19

### Divisors of 68

• Number of divisors d(n): 6
• Complete list of divisors:
• Sum of all divisors σ(n): 126
• Sum of proper divisors (its aliquot sum) s(n): 58
• 68 is a deficient number, because the sum of its proper divisors (58) is less than itself. Its deficiency is 10

### Bases of 68

• Binary: 10001002
• Base-36: 1W

### Squares and roots of 68

• 68 squared (682) is 4624
• 68 cubed (683) is 314432
• The square root of 68 is 8.2462112513
• The cube root of 68 is 4.0816551019

### Scales and comparisons

How big is 68?
• 68 seconds is equal to 8 seconds.
• To count from 1 to 68 would take you about thirty-four 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 68 cubic inches would be around 0.3 feet tall.

### Recreational maths with 68

• 68 backwards is 86
• The number of decimal digits it has is: 2
• The sum of 68's digits is 14
• More coming soon!