207704066161 has 2 divisors, whose sum is σ = 207704066162. Its totient is φ = 207704066160.

The previous prime is 207704066149. The next prime is 207704066209. The reversal of 207704066161 is 161660407702.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 205611461136 + 2092605025 = 453444^2 + 45745^2 .

It is a cyclic number.

It is not a de Polignac number, because 207704066161 - 2⁷ = 207704066033 is a prime.

It is not a weakly prime, because it can be changed into another prime (207704067161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103852033080 + 103852033081.

It is an arithmetic number, because the mean of its divisors is an integer number (103852033081).

Almost surely, 2^207704066161 is an apocalyptic number.

It is an amenable number.

207704066161 is a deficient number, since it is larger than the sum of its proper divisors (1).

207704066161 is an equidigital number, since it uses as much as digits as its factorization.

207704066161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 84672, while the sum is 40.

The spelling of 207704066161 in words is "two hundred seven billion, seven hundred four million, sixty-six thousand, one hundred sixty-one".