6668443 has 4 divisors (see below), whose sum is σ = 6768040. Its totient is φ = 6568848.

The previous prime is 6668429. The next prime is 6668447. The reversal of 6668443 is 3448666.

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 6668443 - 2⁹ = 6667931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6668447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49698 + ... + 49831.

It is an arithmetic number, because the mean of its divisors is an integer number (1692010).

Almost surely, 2^6668443 is an apocalyptic number.

6668443 is a deficient number, since it is larger than the sum of its proper divisors (99597).

6668443 is an equidigital number, since it uses as much as digits as its factorization.

6668443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99596.

The product of its digits is 82944, while the sum is 37.

The square root of 6668443 is about 2582.3328600318. The cubic root of 6668443 is about 188.2239202284.

The spelling of 6668443 in words is "six million, six hundred sixty-eight thousand, four hundred forty-three".