166065642733 has 2 divisors, whose sum is σ = 166065642734. Its totient is φ = 166065642732.

The previous prime is 166065642671. The next prime is 166065642839. The reversal of 166065642733 is 337246560661.

166065642733 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., 97755024964 + 68310617769 = 312658^2 + 261363^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166065642733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166065642133) 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, 83032821366 + 83032821367.

It is an arithmetic number, because the mean of its divisors is an integer number (83032821367).

Almost surely, 2^166065642733 is an apocalyptic number.

It is an amenable number.

166065642733 is a deficient number, since it is larger than the sum of its proper divisors (1).

166065642733 is an equidigital number, since it uses as much as digits as its factorization.

166065642733 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3265920, while the sum is 49.

The spelling of 166065642733 in words is "one hundred sixty-six billion, sixty-five million, six hundred forty-two thousand, seven hundred thirty-three".