65 (number)

The number 65 is an integer that follows 64 and precedes 66. It is an odd number and can be factored into prime numbers as \(5 \times 13\). In terms of properties, 65 is significant in various contexts: - **Mathematics**: It is the sum of the first four triangular numbers (1 + 3 + 6 + 10 + 15 + 20 = 65).