66109822439 has 2 divisors, whose sum is σ = 66109822440. Its totient is φ = 66109822438.

The previous prime is 66109822381. The next prime is 66109822453. The reversal of 66109822439 is 93422890166.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66109822439 - 2²⁴ = 66093045223 is a prime.

It is a super-2 number, since 2×66109822439² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66109822459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33054911219 + 33054911220.

It is an arithmetic number, because the mean of its divisors is an integer number (33054911220).

Almost surely, 2^66109822439 is an apocalyptic number.

66109822439 is a deficient number, since it is larger than the sum of its proper divisors (1).

66109822439 is an equidigital number, since it uses as much as digits as its factorization.

66109822439 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1119744, while the sum is 50.

The spelling of 66109822439 in words is "sixty-six billion, one hundred nine million, eight hundred twenty-two thousand, four hundred thirty-nine".