6621443 has 8 divisors (see below), whose sum is σ = 6993600. Its totient is φ = 6251688.

The previous prime is 6621421. The next prime is 6621451. The reversal of 6621443 is 3441266.

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 6621443 - 2⁶ = 6621379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6621413) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10388 + ... + 11006.

It is an arithmetic number, because the mean of its divisors is an integer number (874200).

Almost surely, 2^6621443 is an apocalyptic number.

6621443 is a deficient number, since it is larger than the sum of its proper divisors (372157).

6621443 is a wasteful number, since it uses less digits than its factorization.

6621443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1201.

The product of its digits is 3456, while the sum is 26.

The square root of 6621443 is about 2573.2164697126. The cubic root of 6621443 is about 187.7806688422.

The spelling of 6621443 in words is "six million, six hundred twenty-one thousand, four hundred forty-three".