The speed of light in a vacuum is approximately 3.00 x 10^8 m/s. The relationship between frequency, wavelength, and speed of light is given by the formula:
wavelength = speed of light / frequency
Substituting the given values, we get:
wavelength = 3.00 x 10^8 m/s / 6.50 x 10^7 Hz
wavelength = 4.62 meters
Therefore, the wavelength of the radio wave traveling in a vacuum with a frequency of 6.50x10^7 Hz is 4.62 meters (m).