6659441 has 2 divisors, whose sum is σ = 6659442. Its totient is φ = 6659440.

The previous prime is 6659437. The next prime is 6659447. The reversal of 6659441 is 1449566.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3783025 + 2876416 = 1945^2 + 1696^2 .

It is a cyclic number.

It is not a de Polignac number, because 6659441 - 2² = 6659437 is a prime.

It is a Sophie Germain prime.

It is an Ulam number.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (6659447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3329720 + 3329721.

It is an arithmetic number, because the mean of its divisors is an integer number (3329721).

Almost surely, 2^6659441 is an apocalyptic number.

It is an amenable number.

6659441 is a deficient number, since it is larger than the sum of its proper divisors (1).

6659441 is an equidigital number, since it uses as much as digits as its factorization.

6659441 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25920, while the sum is 35.

The square root of 6659441 is about 2580.5892737900. The cubic root of 6659441 is about 188.1391850689.

The spelling of 6659441 in words is "six million, six hundred fifty-nine thousand, four hundred forty-one".