6666847 has 4 divisors (see below), whose sum is σ = 7272936. Its totient is φ = 6060760.

The previous prime is 6666841. The next prime is 6666883. The reversal of 6666847 is 7486666.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6666847 - 2⁷ = 6666719 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6666841) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 303028 + ... + 303049.

It is an arithmetic number, because the mean of its divisors is an integer number (1818234).

Almost surely, 2^6666847 is an apocalyptic number.

6666847 is a deficient number, since it is larger than the sum of its proper divisors (606089).

6666847 is a wasteful number, since it uses less digits than its factorization.

6666847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 606088.

The product of its digits is 290304, while the sum is 43.

The square root of 6666847 is about 2582.0238186353. The cubic root of 6666847 is about 188.2089027625.

The spelling of 6666847 in words is "six million, six hundred sixty-six thousand, eight hundred forty-seven".