66105539 has 2 divisors, whose sum is σ = 66105540. Its totient is φ = 66105538.

The previous prime is 66105527. The next prime is 66105553. The reversal of 66105539 is 93550166.

66105539 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 is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66105539 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66105499 and 66105508.

It is not a weakly prime, because it can be changed into another prime (66104539) 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, 33052769 + 33052770.

It is an arithmetic number, because the mean of its divisors is an integer number (33052770).

Almost surely, 2^66105539 is an apocalyptic number.

66105539 is a deficient number, since it is larger than the sum of its proper divisors (1).

66105539 is an equidigital number, since it uses as much as digits as its factorization.

66105539 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24300, while the sum is 35.

The square root of 66105539 is about 8130.5312864535. The cubic root of 66105539 is about 404.3392956443.

The spelling of 66105539 in words is "sixty-six million, one hundred five thousand, five hundred thirty-nine".