165260566434361 has 2 divisors, whose sum is σ = 165260566434362. Its totient is φ = 165260566434360.

The previous prime is 165260566434269. The next prime is 165260566434373. The reversal of 165260566434361 is 163434665062561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 94687125794361 + 70573440640000 = 9730731^2 + 8400800^2 .

It is a cyclic number.

It is not a de Polignac number, because 165260566434361 - 2²⁵ = 165260532879929 is a prime.

It is a super-2 number, since 2×165260566434361² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 165260566434296 and 165260566434305.

It is not a weakly prime, because it can be changed into another prime (165260566404361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82630283217180 + 82630283217181.

It is an arithmetic number, because the mean of its divisors is an integer number (82630283217181).

Almost surely, 2^{165260566434361} is an apocalyptic number.

It is an amenable number.

165260566434361 is a deficient number, since it is larger than the sum of its proper divisors (1).

165260566434361 is an equidigital number, since it uses as much as digits as its factorization.

165260566434361 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 55987200, while the sum is 58.

The spelling of 165260566434361 in words is "one hundred sixty-five trillion, two hundred sixty billion, five hundred sixty-six million, four hundred thirty-four thousand, three hundred sixty-one".