6660197 has 2 divisors, whose sum is σ = 6660198. Its totient is φ = 6660196.

The previous prime is 6660193. The next prime is 6660211. The reversal of 6660197 is 7910666.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5997601 + 662596 = 2449^2 + 814^2 .

It is a cyclic number.

It is not a de Polignac number, because 6660197 - 2² = 6660193 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6660191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3330098 + 3330099.

It is an arithmetic number, because the mean of its divisors is an integer number (3330099).

Almost surely, 2^6660197 is an apocalyptic number.

It is an amenable number.

6660197 is a deficient number, since it is larger than the sum of its proper divisors (1).

6660197 is an equidigital number, since it uses as much as digits as its factorization.

6660197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 6660197 is about 2580.7357478053. The cubic root of 6660197 is about 188.1463041770.

The spelling of 6660197 in words is "six million, six hundred sixty thousand, one hundred ninety-seven".