6680549 has 2 divisors, whose sum is σ = 6680550. Its totient is φ = 6680548.

The previous prime is 6680543. The next prime is 6680551. The reversal of 6680549 is 9450866.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4072324 + 2608225 = 2018^2 + 1615^2 .

It is a cyclic number.

It is not a de Polignac number, because 6680549 - 2¹⁶ = 6615013 is a prime.

Together with 6680551, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6680543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3340274 + 3340275.

It is an arithmetic number, because the mean of its divisors is an integer number (3340275).

Almost surely, 2^6680549 is an apocalyptic number.

It is an amenable number.

6680549 is a deficient number, since it is larger than the sum of its proper divisors (1).

6680549 is an equidigital number, since it uses as much as digits as its factorization.

6680549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 6680549 is about 2584.6758017206. The cubic root of 6680549 is about 188.3377529614.

The spelling of 6680549 in words is "six million, six hundred eighty thousand, five hundred forty-nine".