6661349 has 2 divisors, whose sum is σ = 6661350. Its totient is φ = 6661348.

The previous prime is 6661337. The next prime is 6661367. The reversal of 6661349 is 9431666.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5373124 + 1288225 = 2318^2 + 1135^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6661349 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6661379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3330674 + 3330675.

It is an arithmetic number, because the mean of its divisors is an integer number (3330675).

Almost surely, 2^6661349 is an apocalyptic number.

It is an amenable number.

6661349 is a deficient number, since it is larger than the sum of its proper divisors (1).

6661349 is an equidigital number, since it uses as much as digits as its factorization.

6661349 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23328, while the sum is 35.

The square root of 6661349 is about 2580.9589303203. The cubic root of 6661349 is about 188.1571513060.

The spelling of 6661349 in words is "six million, six hundred sixty-one thousand, three hundred forty-nine".