6657449 has 2 divisors, whose sum is σ = 6657450. Its totient is φ = 6657448.

The previous prime is 6657437. The next prime is 6657451. The reversal of 6657449 is 9447566.

6657449 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5569600 + 1087849 = 2360^2 + 1043^2 .

It is a cyclic number.

It is not a de Polignac number, because 6657449 - 2⁸ = 6657193 is a prime.

Together with 6657451, it forms a pair of twin primes.

It is a Chen prime.

It is a d-powerful number, because it can be written as 6² + 6⁴ + 5 + 7⁷ + 4⁵ + 4¹⁰ + 9⁷ .

It is not a weakly prime, because it can be changed into another prime (6657349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3328724 + 3328725.

It is an arithmetic number, because the mean of its divisors is an integer number (3328725).

Almost surely, 2^6657449 is an apocalyptic number.

It is an amenable number.

6657449 is a deficient number, since it is larger than the sum of its proper divisors (1).

6657449 is an equidigital number, since it uses as much as digits as its factorization.

6657449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 181440, while the sum is 41.

The square root of 6657449 is about 2580.2032865648. The cubic root of 6657449 is about 188.1204242034.

The spelling of 6657449 in words is "six million, six hundred fifty-seven thousand, four hundred forty-nine".