66262120243157 has 2 divisors, whose sum is σ = 66262120243158. Its totient is φ = 66262120243156.

The previous prime is 66262120243069. The next prime is 66262120243217. The reversal of 66262120243157 is 75134202126266.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47104420186756 + 19157700056401 = 6863266^2 + 4376951^2 .

It is a cyclic number.

It is not a de Polignac number, because 66262120243157 - 2³⁰ = 66261046501333 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66262120243457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33131060121578 + 33131060121579.

It is an arithmetic number, because the mean of its divisors is an integer number (33131060121579).

Almost surely, 2^{66262120243157} is an apocalyptic number.

It is an amenable number.

66262120243157 is a deficient number, since it is larger than the sum of its proper divisors (1).

66262120243157 is an equidigital number, since it uses as much as digits as its factorization.

66262120243157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1451520, while the sum is 47.

The spelling of 66262120243157 in words is "sixty-six trillion, two hundred sixty-two billion, one hundred twenty million, two hundred forty-three thousand, one hundred fifty-seven".