165355585 has 8 divisors (see below), whose sum is σ = 201145320. Its totient is φ = 130472064.

The previous prime is 165355577. The next prime is 165355591. The reversal of 165355585 is 585553561.

It can be written as a sum of positive squares in 4 ways, for example, as 74114881 + 91240704 = 8609^2 + 9552^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 165355585 - 2³ = 165355577 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 226150 + ... + 226879.

It is an arithmetic number, because the mean of its divisors is an integer number (25143165).

Almost surely, 2^165355585 is an apocalyptic number.

It is an amenable number.

165355585 is a deficient number, since it is larger than the sum of its proper divisors (35789735).

165355585 is an equidigital number, since it uses as much as digits as its factorization.

165355585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 453107.

The product of its digits is 450000, while the sum is 43.

The square root of 165355585 is about 12859.0662569255. The cubic root of 165355585 is about 548.8743755659.

The spelling of 165355585 in words is "one hundred sixty-five million, three hundred fifty-five thousand, five hundred eighty-five".