66262120243199 has 4 divisors (see below), whose sum is σ = 66270362833680. Its totient is φ = 66253877652720.

The previous prime is 66262120243157. The next prime is 66262120243217. The reversal of 66262120243199 is 99134202126266.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66262120243199 - 2²⁸ = 66261851807743 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66262120243199.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66262120243699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4121283182 + ... + 4121299259.

It is an arithmetic number, because the mean of its divisors is an integer number (16567590708420).

Almost surely, 2^{66262120243199} is an apocalyptic number.

66262120243199 is a deficient number, since it is larger than the sum of its proper divisors (8242590481).

66262120243199 is an equidigital number, since it uses as much as digits as its factorization.

66262120243199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8242590480.

The product of its (nonzero) digits is 3359232, while the sum is 53.

The spelling of 66262120243199 in words is "sixty-six trillion, two hundred sixty-two billion, one hundred twenty million, two hundred forty-three thousand, one hundred ninety-nine".