66242597 has 2 divisors, whose sum is σ = 66242598. Its totient is φ = 66242596.

The previous prime is 66242563. The next prime is 66242669. The reversal of 66242597 is 79524266.

66242597 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65788321 + 454276 = 8111^2 + 674^2 .

It is a cyclic number.

It is not a de Polignac number, because 66242597 - 2²⁰ = 65194021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66242497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33121298 + 33121299.

It is an arithmetic number, because the mean of its divisors is an integer number (33121299).

Almost surely, 2^66242597 is an apocalyptic number.

It is an amenable number.

66242597 is a deficient number, since it is larger than the sum of its proper divisors (1).

66242597 is an equidigital number, since it uses as much as digits as its factorization.

66242597 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 181440, while the sum is 41.

The square root of 66242597 is about 8138.9555226700. The cubic root of 66242597 is about 404.6185444554.

It can be divided in two parts, 6624259 and 7, that added together give a palindrome (6624266).

The spelling of 66242597 in words is "sixty-six million, two hundred forty-two thousand, five hundred ninety-seven".