6660443 has 4 divisors (see below), whose sum is σ = 6875328. Its totient is φ = 6445560.

The previous prime is 6660427. The next prime is 6660473. The reversal of 6660443 is 3440666.

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 6660443 - 2⁴ = 6660427 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6660473) 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, 107396 + ... + 107457.

It is an arithmetic number, because the mean of its divisors is an integer number (1718832).

Almost surely, 2^6660443 is an apocalyptic number.

6660443 is a deficient number, since it is larger than the sum of its proper divisors (214885).

6660443 is a wasteful number, since it uses less digits than its factorization.

6660443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214884.

The product of its (nonzero) digits is 10368, while the sum is 29.

The square root of 6660443 is about 2580.7834081922. The cubic root of 6660443 is about 188.1486205960.

The spelling of 6660443 in words is "six million, six hundred sixty thousand, four hundred forty-three".