1766
1766 is the year hydrogen was identified as a distinct substance.
- Even
- Composite
Where 1766 fits
Why 1766 is special
Cavendish called it inflammable air and showed burning it produced water, which meant water was not an element. That result dismantled a two-thousand-year-old framework.
Factors & digit properties
- Divisors (4)
- 1, 2, 883, 1766
- Prime factorisation
- 2 × 883
- Digit sum
- 20
- Digital root
- 2
Representations
- Decimal
- 1766
- Binary
- 11011100110
- Octal
- 3346
- Hexadecimal
- 6e6
- Roman numeral
- MDCCLXVI
- Scientific notation
- 1.766 × 10^3
Other mathematical patterns
- Deficient number
- Semiprime
Related numbers & connections
Cavendish showed in 1766 that burning inflammable air produced water, and oxygen was isolated in 1774. Between them, water and air stopped being elements.
View 1774 →Other connections
- developed from1774
why?
Strength 0.50, confidence "high".
Science
Cavendish showed in 1766 that burning inflammable air produced water. Water had been one of the classical elements since antiquity, and the experiment showed it was a compound.
DocumentedScienceGeography: EnglandPeriod: 1766
Common questions
Is 1766 a prime number?
No, 1766 is not prime.
What are the factors of 1766?
The factors of 1766 are 1, 2, 883, 1766.
What is 1766 in Roman numerals?
1766 in Roman numerals is MDCCLXVI.
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: 3 August 2026