67 (number)

← 66 67 68 →
Cardinalsixty-seven
Ordinal67th
(sixty-seventh)
Factorizationprime
Greek numeralΞΖ´
Roman numeralLXVII
Binary10000112
Ternary21113
Quaternary10034
Quinary2325
Senary1516
Octal1038
Duodecimal5712
Hexadecimal4316
Vigesimal3720
Base 361V36

67 (Sixty-seven) is the natural number that comes after sixty-six and before sixty-eight.

In mathematics

67 is an odd number. It is also a prime number. The 19th prime number more specifically and is the closest answer to ⅔ of 100, as a prime number, its only factors are 1 and itself (67). The number is a Chen prime since 67+2=69, and 69 is the product of 2 prime numbers (3 and 23).

In the Internet

In 2025 it became a part of the 6-7 meme following its inclusion in a Skrilla song, "Doot Doot (6 7)". The number was removed from In-N-Out's ordering system due to the meme.

References

  1. ↑ Vanovschi, Vitalii. "Properties of the number 67". www.numberempire.com. Retrieved 2026-09-27.
  2. ↑ Weisstein, Eric W. "Chen Prime". mathworld.wolfram.com. Wolfram Research, Inc. Retrieved 2026-09-27.
  3. ↑ Pant, Anoushka (Feb 11, 2026). "67: More Than Just Slang". Encyclopædia Britannica.
  4. ↑ Kaur, Dina. "What does '67' mean? Here's what to know about new viral TikTok slang". The Arizona Republic. Retrieved 2026-03-17.
  5. ↑ "In-N-Out removes '67' from its ordering system after viral '6-7' meme". 2025-12-09. Retrieved 2026-03-17.