6566939 has 2 divisors, whose sum is σ = 6566940. Its totient is φ = 6566938.

The previous prime is 6566927. The next prime is 6566957. The reversal of 6566939 is 9396656.

6566939 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6566939 - 2¹⁶ = 6501403 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6566939.

It is not a weakly prime, because it can be changed into another prime (6566909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3283469 + 3283470.

It is an arithmetic number, because the mean of its divisors is an integer number (3283470).

Almost surely, 2^6566939 is an apocalyptic number.

6566939 is a deficient number, since it is larger than the sum of its proper divisors (1).

6566939 is an equidigital number, since it uses as much as digits as its factorization.

6566939 is an evil number, because the sum of its binary digits is even.

The product of its digits is 262440, while the sum is 44.

The square root of 6566939 is about 2562.6039491111. The cubic root of 6566939 is about 187.2640136321.

The spelling of 6566939 in words is "six million, five hundred sixty-six thousand, nine hundred thirty-nine".