6669547 has 2 divisors, whose sum is σ = 6669548. Its totient is φ = 6669546.

The previous prime is 6669541. The next prime is 6669587. The reversal of 6669547 is 7459666.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6669547 - 2¹⁵ = 6636779 is a prime.

It is not a weakly prime, because it can be changed into another prime (6669541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3334773 + 3334774.

It is an arithmetic number, because the mean of its divisors is an integer number (3334774).

Almost surely, 2^6669547 is an apocalyptic number.

6669547 is a deficient number, since it is larger than the sum of its proper divisors (1).

6669547 is an equidigital number, since it uses as much as digits as its factorization.

6669547 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 272160, while the sum is 43.

The square root of 6669547 is about 2582.5466113896. The cubic root of 6669547 is about 188.2343068480.

The spelling of 6669547 in words is "six million, six hundred sixty-nine thousand, five hundred forty-seven".