6720
NGC 6720 is the Ring Nebula, a star's discarded outer layers.
- Even
- Composite
Where 6720 fits
Why 6720 is special
It is what a sun-like star leaves behind when it dies — a shell of expelled gas lit by the exposed core. The Sun will produce something similar in about five billion years.
Factors & digit properties
- Divisors (56)
- 1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 16, 20, 21, 24, 28, 30, 32, 35, 40, 42, 48, 56, 60, 64, 70, 80, 84, 96, 105, 112, 120, 140, 160, 168, 192, 210, 224, 240, 280, 320, 336, 420, 448, 480, 560, 672, 840, 960, 1120, 1344, 1680, 2240, 3360, 6720
- Prime factorisation
- 2^6 × 3 × 5 × 7
- Digit sum
- 15
- Digital root
- 6
Representations
- Decimal
- 6720
- Scientific notation
- 6.720 × 10^3
Roman numerals
Roman numerals as modelled here goes up to 3,999.
Binary
1 1 0 1 0 0 1 0 0 0 0 0 0
1 × 4,096 + 1 × 2,048 + 0 × 1,024 + 1 × 512 + 0 × 256 + 0 × 128 + 1 × 64 + 0 × 32 + 0 × 16 + 0 × 8 + 0 × 4 + 0 × 2 + 0 × 1 = 6,720
Octal
1 5 1 0 0
1 × 4,096 + 5 × 512 + 1 × 64 + 0 × 8 + 0 × 1 = 6,720
Hexadecimal
1 a 4 0
1 × 4,096 + a × 256 + 4 × 16 + 0 × 1 = 6,720
Read as powers of two: 4,096 + 2,048 + 512 + 64 = 6,720.
In historical numeral systems
Egyptian
6 lotuses, 7 coils of rope, 2 hobbles
6 × 1,000 + 7 × 100 + 2 × 10 = 6,720. The signs are simply repeated and added; where they sit on the line is a matter of layout, not value.
Systems that simply cannot reach this value are left out. Where a script needs a font most readers do not have, the reading is given instead of the glyphs — see number systems for each system in full.
Other mathematical patterns
- Abundant number
- Harshad (Niven) number
Related numbers & connections
Both are planetary nebulae whose colour comes from doubly ionised oxygen emission.
View 7662 →Science
The Ring Nebula is the ejected atmosphere of a dying star, illuminated by the remnant core. The Sun is expected to form a comparable structure, which makes it a preview rather than a curiosity.
DocumentedScience
Common questions
Is 6720 a prime number?
No, 6720 is not prime.
What are the factors of 6720?
The factors of 6720 are 1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 16, 20, 21, 24, 28, 30, 32, 35, 40, 42, 48, 56, 60, 64, 70, 80, 84, 96, 105, 112, 120, 140, 160, 168, 192, 210, 224, 240, 280, 320, 336, 420, 448, 480, 560, 672, 840, 960, 1120, 1344, 1680, 2240, 3360, 6720.
About this page's data
Mathematical facts:computed directly from the number's value — nothing to source or verify externally.
Contextual records: 1 reviewer-confirmed record, sourced and reviewed before publication.
Last reviewed: 15 July 2026