6656843 has 4 divisors (see below), whose sum is σ = 7048440. Its totient is φ = 6265248.

The previous prime is 6656833. The next prime is 6656857. The reversal of 6656843 is 3486566.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3486566 = 2 ⋅1743283.

It is not a de Polignac number, because 6656843 - 2⁶ = 6656779 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6656797 and 6656806.

It is not an unprimeable number, because it can be changed into a prime (6656833) 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, 195773 + ... + 195806.

It is an arithmetic number, because the mean of its divisors is an integer number (1762110).

Almost surely, 2^6656843 is an apocalyptic number.

6656843 is a deficient number, since it is larger than the sum of its proper divisors (391597).

6656843 is a wasteful number, since it uses less digits than its factorization.

6656843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391596.

The product of its digits is 103680, while the sum is 38.

The square root of 6656843 is about 2580.0858512848. The cubic root of 6656843 is about 188.1147160892.

The spelling of 6656843 in words is "six million, six hundred fifty-six thousand, eight hundred forty-three".