165883505 has 4 divisors (see below), whose sum is σ = 199060212. Its totient is φ = 132706800.

The previous prime is 165883493. The next prime is 165883507. The reversal of 165883505 is 505388561.

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 109077136 + 56806369 = 10444^2 + 7537^2 .

It is not a de Polignac number, because 165883505 - 2⁶ = 165883441 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (165883507) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16588346 + ... + 16588355.

It is an arithmetic number, because the mean of its divisors is an integer number (49765053).

Almost surely, 2^165883505 is an apocalyptic number.

It is an amenable number.

165883505 is a deficient number, since it is larger than the sum of its proper divisors (33176707).

165883505 is an equidigital number, since it uses as much as digits as its factorization.

165883505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33176706.

The product of its (nonzero) digits is 144000, while the sum is 41.

The square root of 165883505 is about 12879.5770505091. The cubic root of 165883505 is about 549.4578735234.

The spelling of 165883505 in words is "one hundred sixty-five million, eight hundred eighty-three thousand, five hundred five".