It is the 19th prime number (the next is seventy-one). Sixty-seven is the sum of five consecutive primes (7 + 11 + 13 + 17 + 19).

67 is a discriminant to the Heegner number -67.

Sixty-seven is also:

• The atomic number of holmium, a lanthanide.
• The registry of the U.S. Navy's aircraft carrier USS John F. Kennedy (CV-67), named after U.S. President John F. Kennedy.