66122369 has 2 divisors, whose sum is σ = 66122370. Its totient is φ = 66122368.

The previous prime is 66122363. The next prime is 66122387. The reversal of 66122369 is 96322166.

66122369 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., 63600625 + 2521744 = 7975^2 + 1588^2 .

It is a cyclic number.

It is not a de Polignac number, because 66122369 - 2⁸ = 66122113 is a prime.

It is a super-2 number, since 2×66122369² = 8744335364344322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (66122363) 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, 33061184 + 33061185.

It is an arithmetic number, because the mean of its divisors is an integer number (33061185).

Almost surely, 2^66122369 is an apocalyptic number.

It is an amenable number.

66122369 is a deficient number, since it is larger than the sum of its proper divisors (1).

66122369 is an equidigital number, since it uses as much as digits as its factorization.

66122369 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23328, while the sum is 35.

The square root of 66122369 is about 8131.5662083021. The cubic root of 66122369 is about 404.3736067022.

The spelling of 66122369 in words is "sixty-six million, one hundred twenty-two thousand, three hundred sixty-nine".