165326505 has 16 divisors (see below), whose sum is σ = 278445120. Its totient is φ = 83533248.

The previous prime is 165326459. The next prime is 165326519. The reversal of 165326505 is 505623561.

It is not a de Polignac number, because 165326505 - 2¹⁰ = 165325481 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 289762 + ... + 290331.

It is an arithmetic number, because the mean of its divisors is an integer number (17402820).

Almost surely, 2^165326505 is an apocalyptic number.

165326505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

165326505 is a deficient number, since it is larger than the sum of its proper divisors (113118615).

165326505 is a wasteful number, since it uses less digits than its factorization.

165326505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 580120.

The product of its (nonzero) digits is 27000, while the sum is 33.

The square root of 165326505 is about 12857.9354874723. The cubic root of 165326505 is about 548.8421980365.

The spelling of 165326505 in words is "one hundred sixty-five million, three hundred twenty-six thousand, five hundred five".