6659843 has 2 divisors, whose sum is σ = 6659844. Its totient is φ = 6659842.

The previous prime is 6659833. The next prime is 6659893. The reversal of 6659843 is 3489566.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6659843 - 2²² = 2465539 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6659843.

It is not a weakly prime, because it can be changed into another prime (6659803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3329921 + 3329922.

It is an arithmetic number, because the mean of its divisors is an integer number (3329922).

Almost surely, 2^6659843 is an apocalyptic number.

6659843 is a deficient number, since it is larger than the sum of its proper divisors (1).

6659843 is an equidigital number, since it uses as much as digits as its factorization.

6659843 is an evil number, because the sum of its binary digits is even.

The product of its digits is 155520, while the sum is 41.

The square root of 6659843 is about 2580.6671618014. The cubic root of 6659843 is about 188.1429706935.

The spelling of 6659843 in words is "six million, six hundred fifty-nine thousand, eight hundred forty-three".