6566947 has 12 divisors (see below), whose sum is σ = 7210816. Its totient is φ = 5973120.

The previous prime is 6566939. The next prime is 6566957. The reversal of 6566947 is 7496656.

It is not a de Polignac number, because 6566947 - 2³ = 6566939 is a prime.

It is an Ulam number.

It is a Duffinian number.

6566947 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (6566927) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8593 + ... + 9325.

Almost surely, 2^6566947 is an apocalyptic number.

6566947 is a deficient number, since it is larger than the sum of its proper divisors (643869).

6566947 is a wasteful number, since it uses less digits than its factorization.

6566947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 798 (or 781 counting only the distinct ones).

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

The square root of 6566947 is about 2562.6055100230. The cubic root of 6566947 is about 187.2640896752.

The spelling of 6566947 in words is "six million, five hundred sixty-six thousand, nine hundred forty-seven".