6665437 has 2 divisors, whose sum is σ = 6665438. Its totient is φ = 6665436.

The previous prime is 6665413. The next prime is 6665497. The reversal of 6665437 is 7345666.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3956121 + 2709316 = 1989^2 + 1646^2 .

It is a cyclic number.

It is not a de Polignac number, because 6665437 - 2¹¹ = 6663389 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6665396 and 6665405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6665497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3332718 + 3332719.

It is an arithmetic number, because the mean of its divisors is an integer number (3332719).

Almost surely, 2^6665437 is an apocalyptic number.

It is an amenable number.

6665437 is a deficient number, since it is larger than the sum of its proper divisors (1).

6665437 is an equidigital number, since it uses as much as digits as its factorization.

6665437 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 37.

The square root of 6665437 is about 2581.7507625640. The cubic root of 6665437 is about 188.1956334583.

The spelling of 6665437 in words is "six million, six hundred sixty-five thousand, four hundred thirty-seven".