67
67 is a prime number and the atomic number of holmium.
- Odd
- Prime
Where 67 fits
Why 67 is special
67's primality (the 19th prime) is its main mathematical distinction, with no widely documented cultural association of its own.
67 is part of
Factors & digit properties
- Divisors (2)
- 1, 67
- Prime factorisation
- 67
- Digit sum
- 13
- Digital root
- 4
Representations
- Decimal
- 67
- Binary
- 1000011
- Octal
- 103
- Hexadecimal
- 43
- Roman numeral
- LXVII
- Scientific notation
- 6.700 × 10^1
Other mathematical patterns
- Deficient number
- Lucky number (mathematical sieve)
Related numbers & connections
Mathematical relationship67 and 66 are consecutive integers.
67 is adjacent to 6667 and 66 are consecutive integers.
67 and 66 are consecutive integers.
View 66 →Nearby in a sequence
- is adjacent to66
why?
Strength 0.50, confidence "high".
Science
67 is the atomic number of holmium.
DocumentedScience
Mathematics
67 is prime — the 19th prime number.
DocumentedMathematics
Common questions
Is 67 a prime number?
Yes, 67 is prime — it has exactly two positive divisors: 1 and itself.
What are the factors of 67?
The factors of 67 are 1, 67.
What is 67 in Roman numerals?
67 in Roman numerals is LXVII.
About this page's data
Mathematical facts:computed directly from the number's value — nothing to source or verify externally.
Contextual records: 2 reviewer-confirmed records, sourced and reviewed before publication.
Last reviewed: 15 July 2026