66122239 has 2 divisors, whose sum is σ = 66122240. Its totient is φ = 66122238.

The previous prime is 66122213. The next prime is 66122249. The reversal of 66122239 is 93222166.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66122239 - 2¹³ = 66114047 is a prime.

It is a Chen prime.

It is equal to p_3902953 and since 66122239 and 3902953 have the same sum of digits, it is a Honaker prime.

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 66122239.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66122209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33061119 + 33061120.

It is an arithmetic number, because the mean of its divisors is an integer number (33061120).

Almost surely, 2^66122239 is an apocalyptic number.

66122239 is a deficient number, since it is larger than the sum of its proper divisors (1).

66122239 is an equidigital number, since it uses as much as digits as its factorization.

66122239 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 31.

The square root of 66122239 is about 8131.5582147581. The cubic root of 66122239 is about 404.3733416955.

The spelling of 66122239 in words is "sixty-six million, one hundred twenty-two thousand, two hundred thirty-nine".