6659943 has 8 divisors (see below), whose sum is σ = 8899056. Its totient is φ = 4430400.

The previous prime is 6659941. The next prime is 6659957. The reversal of 6659943 is 3499566.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6659943 - 2¹ = 6659941 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6659895 and 6659904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6659941) 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, 568 + ... + 3693.

It is an arithmetic number, because the mean of its divisors is an integer number (1112382).

Almost surely, 2^6659943 is an apocalyptic number.

6659943 is a deficient number, since it is larger than the sum of its proper divisors (2239113).

6659943 is a wasteful number, since it uses less digits than its factorization.

6659943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4785.

The product of its digits is 174960, while the sum is 42.

The square root of 6659943 is about 2580.6865365635. The cubic root of 6659943 is about 188.1439123675.

The spelling of 6659943 in words is "six million, six hundred fifty-nine thousand, nine hundred forty-three".