165050665566165 has 12 divisors (see below), whose sum is σ = 286087820314764. Its totient is φ = 88027021635264.

The previous prime is 165050665566113. The next prime is 165050665566223. The reversal of 165050665566165 is 561665566050561.

165050665566165 is a `hidden beast` number, since 1 + 6 + 5 + 0 + 5 + 0 + 6 + 6 + 5 + 5 + 6 + 616 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 70343396087409 + 94707269478756 = 8387097^2 + 9731766^2 .

It is not a de Polignac number, because 165050665566165 - 2⁷ = 165050665566037 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1833896284024 + ... + 1833896284113.

It is an arithmetic number, because the mean of its divisors is an integer number (23840651692897).

Almost surely, 2^{165050665566165} is an apocalyptic number.

165050665566165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

165050665566165 is a deficient number, since it is larger than the sum of its proper divisors (121037154748599).

165050665566165 is a wasteful number, since it uses less digits than its factorization.

165050665566165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3667792568148 (or 3667792568145 counting only the distinct ones).

The product of its (nonzero) digits is 145800000, while the sum is 63.

The spelling of 165050665566165 in words is "one hundred sixty-five trillion, fifty billion, six hundred sixty-five million, five hundred sixty-six thousand, one hundred sixty-five".