6643043 has 4 divisors (see below), whose sum is σ = 7246968. Its totient is φ = 6039120.

The previous prime is 6643033. The next prime is 6643051. The reversal of 6643043 is 3403466.

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 6643043 - 2²⁰ = 5594467 is a prime.

It is a Duffinian number.

It is a plaindrome in base 9.

It is not an unprimeable number, because it can be changed into a prime (6643033) 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 3 ways as a sum of consecutive naturals, for example, 301946 + ... + 301967.

It is an arithmetic number, because the mean of its divisors is an integer number (1811742).

Almost surely, 2^6643043 is an apocalyptic number.

6643043 is a deficient number, since it is larger than the sum of its proper divisors (603925).

6643043 is a wasteful number, since it uses less digits than its factorization.

6643043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 603924.

The product of its (nonzero) digits is 5184, while the sum is 26.

The square root of 6643043 is about 2577.4101342239. The cubic root of 6643043 is about 187.9846354578.

The spelling of 6643043 in words is "six million, six hundred forty-three thousand, forty-three".