16605105 has 32 divisors (see below), whose sum is σ = 29213568. Its totient is φ = 7987200.

The previous prime is 16605077. The next prime is 16605109. The reversal of 16605105 is 50150661.

It is not a de Polignac number, because 16605105 - 2¹⁶ = 16539569 is a prime.

It is a super-2 number, since 2×16605105² = 551459024122050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16605109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25585 + ... + 26225.

It is an arithmetic number, because the mean of its divisors is an integer number (912924).

Almost surely, 2^16605105 is an apocalyptic number.

16605105 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16605105 is a deficient number, since it is larger than the sum of its proper divisors (12608463).

16605105 is a wasteful number, since it uses less digits than its factorization.

16605105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 817.

The product of its (nonzero) digits is 900, while the sum is 24.

The square root of 16605105 is about 4074.9361958195. The cubic root of 16605105 is about 255.1215875371.

Adding to 16605105 its reverse (50150661), we get a palindrome (66755766).

The spelling of 16605105 in words is "sixteen million, six hundred five thousand, one hundred five".