2 * 3 * 5 * 7 = 210 is the smallest one divisible by four unique prime numbers.
However, there are an infinite number of them, since there are an infinite number of primes.
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the least number is 210 which is divisible by four different prime numbers.
The smallest number divisible by first four prime numbers is 2x3x5x7 = 210.
There aren't any prime numbers divisible by 4. Prime numbers aren't divisible by anything except 1 and the number.
Prime numbers are only divisible by 1 and themselves. Since 3 is not a prime number, any prime number divisible by 3 does not exist. Therefore, the set of prime numbers divisible by 3 is an empty set.
The prime numbers between 50 and 70 are: 53 59 61 67 Therefore, there are four prime numbers between 50 and 70.