201071660617 has 2 divisors, whose sum is σ = 201071660618. Its totient is φ = 201071660616.

The previous prime is 201071660611. The next prime is 201071660653. The reversal of 201071660617 is 716066170102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 127874899216 + 73196761401 = 357596^2 + 270549^2 .

It is a cyclic number.

It is not a de Polignac number, because 201071660617 - 2³⁵ = 166711922249 is a prime.

It is not a weakly prime, because it can be changed into another prime (201071660611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100535830308 + 100535830309.

It is an arithmetic number, because the mean of its divisors is an integer number (100535830309).

Almost surely, 2^201071660617 is an apocalyptic number.

It is an amenable number.

201071660617 is a deficient number, since it is larger than the sum of its proper divisors (1).

201071660617 is an equidigital number, since it uses as much as digits as its factorization.

201071660617 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21168, while the sum is 37.

The spelling of 201071660617 in words is "two hundred one billion, seventy-one million, six hundred sixty thousand, six hundred seventeen".