660197 has 2 divisors, whose sum is σ = 660198. Its totient is φ = 660196.

The previous prime is 660181. The next prime is 660199. The reversal of 660197 is 791066.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 586756 + 73441 = 766^2 + 271^2 .

It is a cyclic number.

It is not a de Polignac number, because 660197 - 2⁴ = 660181 is a prime.

Together with 660199, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (660199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330098 + 330099.

It is an arithmetic number, because the mean of its divisors is an integer number (330099).

2⁶⁶⁰¹⁹⁷ is an apocalyptic number.

It is an amenable number.

660197 is a deficient number, since it is larger than the sum of its proper divisors (1).

660197 is an equidigital number, since it uses as much as digits as its factorization.

660197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2268, while the sum is 29.

The square root of 660197 is about 812.5250765361. The cubic root of 660197 is about 87.0745386650.

The spelling of 660197 in words is "six hundred sixty thousand, one hundred ninety-seven".