6684647 has 2 divisors, whose sum is σ = 6684648. Its totient is φ = 6684646.

The previous prime is 6684631. The next prime is 6684659. The reversal of 6684647 is 7464866.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6684647 - 2⁴ = 6684631 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6684607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3342323 + 3342324.

It is an arithmetic number, because the mean of its divisors is an integer number (3342324).

Almost surely, 2^6684647 is an apocalyptic number.

6684647 is a deficient number, since it is larger than the sum of its proper divisors (1).

6684647 is an equidigital number, since it uses as much as digits as its factorization.

6684647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 193536, while the sum is 41.

The square root of 6684647 is about 2585.4684295114. The cubic root of 6684647 is about 188.3762553036.

The spelling of 6684647 in words is "six million, six hundred eighty-four thousand, six hundred forty-seven".