6656443 has 8 divisors (see below), whose sum is σ = 6847808. Its totient is φ = 6466824.

The previous prime is 6656437. The next prime is 6656449. The reversal of 6656443 is 3446566.

It is an interprime number because it is at equal distance from previous prime (6656437) and next prime (6656449).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6656443 - 2⁹ = 6655931 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6656399 and 6656408.

It is not an unprimeable number, because it can be changed into a prime (6656449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11896 + ... + 12442.

It is an arithmetic number, because the mean of its divisors is an integer number (855976).

Almost surely, 2^6656443 is an apocalyptic number.

6656443 is a deficient number, since it is larger than the sum of its proper divisors (191365).

6656443 is a wasteful number, since it uses less digits than its factorization.

6656443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 873.

The product of its digits is 51840, while the sum is 34.

The square root of 6656443 is about 2580.0083333199. The cubic root of 6656443 is about 188.1109481673.

The spelling of 6656443 in words is "six million, six hundred fifty-six thousand, four hundred forty-three".