16705505 has 4 divisors (see below), whose sum is σ = 20046612. Its totient is φ = 13364400.

The previous prime is 16705499. The next prime is 16705517. The reversal of 16705505 is 50550761.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50550761 = 61 ⋅828701.

It can be written as a sum of positive squares in 2 ways, for example, as 5841889 + 10863616 = 2417^2 + 3296^2 .

It is not a de Polignac number, because 16705505 - 2⁴ = 16705489 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1670546 + ... + 1670555.

It is an arithmetic number, because the mean of its divisors is an integer number (5011653).

Almost surely, 2^16705505 is an apocalyptic number.

It is an amenable number.

16705505 is a deficient number, since it is larger than the sum of its proper divisors (3341107).

16705505 is an equidigital number, since it uses as much as digits as its factorization.

16705505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3341106.

The product of its (nonzero) digits is 5250, while the sum is 29.

The square root of 16705505 is about 4087.2368416817. The cubic root of 16705505 is about 255.6347380831.

The spelling of 16705505 in words is "sixteen million, seven hundred five thousand, five hundred five".