Number 686 is an integer that follows 685 and precedes 687. It is an even number, meaning it is divisible by 2 without a remainder. In mathematics, it can be factored into prime numbers as 2 × 343, where 343 is itself 7 raised to the power of 3, or 7^3. In various contexts, the number 686 may have specific significance. For example, in numerology, it can be interpreted as a combination of the energies of the numbers 6 and 8. Additionally, in geography, there may be locations or codes associated with the number 686, such as area codes or postal codes.