165660105643 has 2 divisors, whose sum is σ = 165660105644. Its totient is φ = 165660105642.

The previous prime is 165660105607. The next prime is 165660105733. The reversal of 165660105643 is 346501066561.

165660105643 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 not a de Polignac number, because 165660105643 - 2⁹ = 165660105131 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 165660105643.

It is not a weakly prime, because it can be changed into another prime (165660100643) 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, 82830052821 + 82830052822.

It is an arithmetic number, because the mean of its divisors is an integer number (82830052822).

Almost surely, 2^165660105643 is an apocalyptic number.

165660105643 is a deficient number, since it is larger than the sum of its proper divisors (1).

165660105643 is an equidigital number, since it uses as much as digits as its factorization.

165660105643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 388800, while the sum is 43.

The spelling of 165660105643 in words is "one hundred sixty-five billion, six hundred sixty million, one hundred five thousand, six hundred forty-three".