198066653 has 2 divisors, whose sum is σ = 198066654. Its totient is φ = 198066652.

The previous prime is 198066637. The next prime is 198066683. The reversal of 198066653 is 356660891.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 124055044 + 74011609 = 11138^2 + 8603^2 .

It is an emirp because it is prime and its reverse (356660891) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 198066653 - 2⁴ = 198066637 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198066623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99033326 + 99033327.

It is an arithmetic number, because the mean of its divisors is an integer number (99033327).

Almost surely, 2^198066653 is an apocalyptic number.

It is an amenable number.

198066653 is a deficient number, since it is larger than the sum of its proper divisors (1).

198066653 is an equidigital number, since it uses as much as digits as its factorization.

198066653 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 233280, while the sum is 44.

The square root of 198066653 is about 14073.6154914080. The cubic root of 198066653 is about 582.9130625798.

The spelling of 198066653 in words is "one hundred ninety-eight million, sixty-six thousand, six hundred fifty-three".