201705660677 has 2 divisors, whose sum is σ = 201705660678. Its totient is φ = 201705660676.

The previous prime is 201705660643. The next prime is 201705660743. The reversal of 201705660677 is 776066507102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 198701086081 + 3004574596 = 445759^2 + 54814^2 .

It is a cyclic number.

It is not a de Polignac number, because 201705660677 - 2⁸ = 201705660421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201705666677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100852830338 + 100852830339.

It is an arithmetic number, because the mean of its divisors is an integer number (100852830339).

Almost surely, 2^201705660677 is an apocalyptic number.

It is an amenable number.

201705660677 is a deficient number, since it is larger than the sum of its proper divisors (1).

201705660677 is an equidigital number, since it uses as much as digits as its factorization.

201705660677 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 740880, while the sum is 47.

The spelling of 201705660677 in words is "two hundred one billion, seven hundred five million, six hundred sixty thousand, six hundred seventy-seven".