6659437 has 2 divisors, whose sum is σ = 6659438. Its totient is φ = 6659436.

The previous prime is 6659417. The next prime is 6659441. The reversal of 6659437 is 7349566.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4932841 + 1726596 = 2221^2 + 1314^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6659437 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 6659437.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6659417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3329718 + 3329719.

It is an arithmetic number, because the mean of its divisors is an integer number (3329719).

Almost surely, 2^6659437 is an apocalyptic number.

It is an amenable number.

6659437 is a deficient number, since it is larger than the sum of its proper divisors (1).

6659437 is an equidigital number, since it uses as much as digits as its factorization.

6659437 is an evil number, because the sum of its binary digits is even.

The product of its digits is 136080, while the sum is 40.

The square root of 6659437 is about 2580.5884987731. The cubic root of 6659437 is about 188.1391474002.

The spelling of 6659437 in words is "six million, six hundred fifty-nine thousand, four hundred thirty-seven".