66222539 has 2 divisors, whose sum is σ = 66222540. Its totient is φ = 66222538.

The previous prime is 66222509. The next prime is 66222547. The reversal of 66222539 is 93522266.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66222539 - 2¹² = 66218443 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66222499 and 66222508.

It is not a weakly prime, because it can be changed into another prime (66222509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33111269 + 33111270.

It is an arithmetic number, because the mean of its divisors is an integer number (33111270).

Almost surely, 2^66222539 is an apocalyptic number.

66222539 is a deficient number, since it is larger than the sum of its proper divisors (1).

66222539 is an equidigital number, since it uses as much as digits as its factorization.

66222539 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 38880, while the sum is 35.

The square root of 66222539 is about 8137.7232073842. The cubic root of 66222539 is about 404.5777013604.

The spelling of 66222539 in words is "sixty-six million, two hundred twenty-two thousand, five hundred thirty-nine".