66093197 has 2 divisors, whose sum is σ = 66093198. Its totient is φ = 66093196.

The previous prime is 66093163. The next prime is 66093199. The reversal of 66093197 is 79139066.

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., 35832196 + 30261001 = 5986^2 + 5501^2 .

It is a cyclic number.

It is not a de Polignac number, because 66093197 - 2⁶ = 66093133 is a prime.

Together with 66093199, 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 (66093199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33046598 + 33046599.

It is an arithmetic number, because the mean of its divisors is an integer number (33046599).

Almost surely, 2^66093197 is an apocalyptic number.

It is an amenable number.

66093197 is a deficient number, since it is larger than the sum of its proper divisors (1).

66093197 is an equidigital number, since it uses as much as digits as its factorization.

66093197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 61236, while the sum is 41.

The square root of 66093197 is about 8129.7722600329. The cubic root of 66093197 is about 404.3141305005.

The spelling of 66093197 in words is "sixty-six million, ninety-three thousand, one hundred ninety-seven".