# 664720

## 664,720 is an even composite number composed of four prime numbers multiplied together.

What does the number 664720 look like?

This visualization shows the relationship between its 4 prime factors (large circles) and 40 divisors.

664720 is an even composite number. It is composed of four distinct prime numbers multiplied together. It has a total of forty divisors.

## Prime factorization of 664720:

### 24 × 5 × 7 × 1187

(2 × 2 × 2 × 2 × 5 × 7 × 1187)

See below for interesting mathematical facts about the number 664720 from the Numbermatics database.

### Names of 664720

• Cardinal: 664720 can be written as Six hundred sixty-four thousand, seven hundred twenty.

### Scientific notation

• Scientific notation: 6.6472 × 105

### Factors of 664720

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 1201

### Divisors of 664720

• Number of divisors d(n): 40
• Complete list of divisors:
• Sum of all divisors σ(n): 1767744
• Sum of proper divisors (its aliquot sum) s(n): 1103024
• 664720 is an abundant number, because the sum of its proper divisors (1103024) is greater than itself. Its abundance is 438304

### Bases of 664720

• Binary: 101000100100100100002
• Base-36: E8WG

### Squares and roots of 664720

• 664720 squared (6647202) is 441852678400
• 664720 cubed (6647203) is 293708312386048000
• The square root of 664720 is 815.3036244247
• The cube root of 664720 is 87.2729350795

### Scales and comparisons

How big is 664720?
• 664,720 seconds is equal to 16 hours, 38 minutes, 40 seconds.
• To count from 1 to 664,720 would take you about sixteen hours!

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 664720 cubic inches would be around 7.3 feet tall.

### Recreational maths with 664720

• 664720 backwards is 027466
• The number of decimal digits it has is: 6
• The sum of 664720's digits is 25
• More coming soon!