6806647 has 4 divisors (see below), whose sum is σ = 7207056. Its totient is φ = 6406240.

The previous prime is 6806633. The next prime is 6806651. The reversal of 6806647 is 7466086.

6806647 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6806647 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6806687) 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, 200179 + ... + 200212.

It is an arithmetic number, because the mean of its divisors is an integer number (1801764).

Almost surely, 2^6806647 is an apocalyptic number.

6806647 is a deficient number, since it is larger than the sum of its proper divisors (400409).

6806647 is a wasteful number, since it uses less digits than its factorization.

6806647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400408.

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 6806647 is about 2608.9551548465. The cubic root of 6806647 is about 189.5153576478.

The spelling of 6806647 in words is "six million, eight hundred six thousand, six hundred forty-seven".