201705660643 has 2 divisors, whose sum is σ = 201705660644. Its totient is φ = 201705660642.

The previous prime is 201705660599. The next prime is 201705660677. The reversal of 201705660643 is 346066507102.

201705660643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 201705660643 - 2⁹ = 201705660131 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 201705660596 and 201705660605.

It is not a weakly prime, because it can be changed into another prime (201705660743) 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, 100852830321 + 100852830322.

It is an arithmetic number, because the mean of its divisors is an integer number (100852830322).

Almost surely, 2^201705660643 is an apocalyptic number.

201705660643 is a deficient number, since it is larger than the sum of its proper divisors (1).

201705660643 is an equidigital number, since it uses as much as digits as its factorization.

201705660643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 181440, while the sum is 40.

The spelling of 201705660643 in words is "two hundred one billion, seven hundred five million, six hundred sixty thousand, six hundred forty-three".