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|---|---|---|---|---|
| Cardinal | sixty-seven | |||
| Ordinal | 67th (sixty-seventh) | |||
| Factorization | prime | |||
| Prime | 19th | |||
| Divisors | 1, 67 | |||
| Greek numeral | ΞΖ´ | |||
| Roman numeral | LXVII, lxvii | |||
| Binary | 10000112 | |||
| Ternary | 21113 | |||
| Senary | 1516 | |||
| Octal | 1038 | |||
| Duodecimal | 5712 | |||
| Hexadecimal | 4316 | |||
67 (sixty-seven) is the natural number following 66 and preceding 68. It is an odd and prime number.
In mathematics
[edit]67 is a Chen prime,[1] an irregular prime,[2] a lucky prime,[3] a Heegner number,[4] a super-prime,[5] an isolated prime,[6] a sexy prime, and a Pillai prime. It is also rounded to the nearest whole number as a percent.
Internet culture
[edit]6-7 is a meme, typically popularized by Generation Alpha. It was originally from a rap song called "Doot Doot (6 7)".[7][8] It is also associated with basketball player LaMelo Ball, who is 6 ft 7 in (2.01 m) in height.[9] It is cited as part of the brainrot phenomenon, or poor-quality digital media.[10] "6-7" is often accompanied by a hand gesture, and reportedly means nothing. Due to popularity and widespread use by young people, Dictionary.com named it the word of the year for 2025.[11][12]
References
[edit]- ^ "Sloane's A109611: Chen primes". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2021-01-08.
- ^ "Sloane's A000928 : Irregular primes". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-29.
- ^ "Sloane's A031157 : Numbers that are both lucky and prime". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-29.
- ^ "Sloane's A003173 : Heegner numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-29.
- ^ "A006450 - OEIS". oeis.org. Retrieved 18 February 2026.
- ^ "A007510 - OEIS". oeis.org. Retrieved 18 February 2026.
- ^ Placido, Dani Di. "What Does '6-7' Mean? The TikTok Meme, Explained". Forbes. Retrieved 2025-10-14.
- ^ Thrasher, Tyler (2025-08-19). "Gen Alpha slang in 2025: The meaning behind words like 'clanker,' '67,' 'crashout'". FOX 5 NY. Retrieved 2025-10-14.
- ^ Hinde, Natasha (2025-07-31). "Kids Keep Saying 'Six-Seven' And Nobody Seems To Know What It Means". HuffPost UK. Retrieved 2025-10-14.
- ^ Robinson, Lauern. "6-7' trend: New 'brain rot' phrase sweeps Aussie classrooms". News.com.au.
- ^ Andrew, Scottie (2025-10-18). "The '6-7' meme can be annoying. But kids are shouting it for good reason". CNN. Retrieved 2025-12-19.
- ^ "Dictionary.com's 2025 Word of the Year Is… | Dictionary.com". Dictionary.com. Retrieved 10 January 2026.
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