6616443 has 4 divisors (see below), whose sum is σ = 8821928. Its totient is φ = 4410960.

The previous prime is 6616403. The next prime is 6616447. The reversal of 6616443 is 3446166.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 6616443 - 2²⁰ = 5567867 is a prime.

It is a D-number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6616443.

It is not an unprimeable number, because it can be changed into a prime (6616447) 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, 1102738 + ... + 1102743.

It is an arithmetic number, because the mean of its divisors is an integer number (2205482).

Almost surely, 2^6616443 is an apocalyptic number.

6616443 is a deficient number, since it is larger than the sum of its proper divisors (2205485).

6616443 is a wasteful number, since it uses less digits than its factorization.

6616443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2205484.

The product of its digits is 10368, while the sum is 30.

The square root of 6616443 is about 2572.2447395223. The cubic root of 6616443 is about 187.7333911430.

The spelling of 6616443 in words is "six million, six hundred sixteen thousand, four hundred forty-three".