6659443 has 24 divisors (see below), whose sum is σ = 8536320. Its totient is φ = 5155920.

The previous prime is 6659441. The next prime is 6659447. The reversal of 6659443 is 3449566.

It is a happy number.

It is not a de Polignac number, because 6659443 - 2¹ = 6659441 is a prime.

Its product of digits (77760) is a multiple of the sum of its prime divisors (360).

It is not an unprimeable number, because it can be changed into a prime (6659441) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21258 + ... + 21568.

It is an arithmetic number, because the mean of its divisors is an integer number (355680).

Almost surely, 2^6659443 is an apocalyptic number.

6659443 is a deficient number, since it is larger than the sum of its proper divisors (1876877).

6659443 is a wasteful number, since it uses less digits than its factorization.

With its successor (6659444) it forms an eRAP, since the sums of their prime factors are consecutive (367 and 368).

6659443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367 (or 360 counting only the distinct ones).

The product of its digits is 77760, while the sum is 37.

The square root of 6659443 is about 2580.5896612984. The cubic root of 6659443 is about 188.1392039032.

The spelling of 6659443 in words is "six million, six hundred fifty-nine thousand, four hundred forty-three".