260164165 has 4 divisors (see below), whose sum is σ = 312197004. Its totient is φ = 208131328.

The previous prime is 260164139. The next prime is 260164213. The reversal of 260164165 is 561461062.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 55845729 + 204318436 = 7473^2 + 14294^2 .

It is a cyclic number.

It is not a de Polignac number, because 260164165 - 2¹⁵ = 260131397 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 26016412 + ... + 26016421.

It is an arithmetic number, because the mean of its divisors is an integer number (78049251).

Almost surely, 2^260164165 is an apocalyptic number.

It is an amenable number.

260164165 is a deficient number, since it is larger than the sum of its proper divisors (52032839).

260164165 is an equidigital number, since it uses as much as digits as its factorization.

260164165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52032838.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 260164165 is about 16129.6052338549. The cubic root of 260164165 is about 638.3847328822.

It can be divided in two parts, 2601 and 64165, that added together give a palindrome (66766).

The spelling of 260164165 in words is "two hundred sixty million, one hundred sixty-four thousand, one hundred sixty-five".