6684659 has 2 divisors, whose sum is σ = 6684660. Its totient is φ = 6684658.

The previous prime is 6684647. The next prime is 6684673. The reversal of 6684659 is 9564866.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6684659 - 2¹² = 6680563 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (6684059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3342329 + 3342330.

It is an arithmetic number, because the mean of its divisors is an integer number (3342330).

Almost surely, 2^6684659 is an apocalyptic number.

6684659 is a deficient number, since it is larger than the sum of its proper divisors (1).

6684659 is an equidigital number, since it uses as much as digits as its factorization.

6684659 is an evil number, because the sum of its binary digits is even.

The product of its digits is 311040, while the sum is 44.

The square root of 6684659 is about 2585.4707501730. The cubic root of 6684659 is about 188.3763680253.

The spelling of 6684659 in words is "six million, six hundred eighty-four thousand, six hundred fifty-nine".