201661105073 has 2 divisors, whose sum is σ = 201661105074. Its totient is φ = 201661105072.

The previous prime is 201661104949. The next prime is 201661105157. The reversal of 201661105073 is 370501166102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 201575856784 + 85248289 = 448972^2 + 9233^2 .

It is a cyclic number.

It is not a de Polignac number, because 201661105073 - 2⁸ = 201661104817 is a prime.

It is not a weakly prime, because it can be changed into another prime (201661105573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100830552536 + 100830552537.

It is an arithmetic number, because the mean of its divisors is an integer number (100830552537).

Almost surely, 2^201661105073 is an apocalyptic number.

It is an amenable number.

201661105073 is a deficient number, since it is larger than the sum of its proper divisors (1).

201661105073 is an equidigital number, since it uses as much as digits as its factorization.

201661105073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7560, while the sum is 32.

The spelling of 201661105073 in words is "two hundred one billion, six hundred sixty-one million, one hundred five thousand, seventy-three".