16800065 has 4 divisors (see below), whose sum is σ = 20160084. Its totient is φ = 13440048.

The previous prime is 16800059. The next prime is 16800083. The reversal of 16800065 is 56000861.

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 3013696 + 13786369 = 1736^2 + 3713^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16800065 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 14.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1680002 + ... + 1680011.

It is an arithmetic number, because the mean of its divisors is an integer number (5040021).

Almost surely, 2^16800065 is an apocalyptic number.

It is an amenable number.

16800065 is a deficient number, since it is larger than the sum of its proper divisors (3360019).

16800065 is an equidigital number, since it uses as much as digits as its factorization.

16800065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3360018.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 16800065 is about 4098.7882355643. The cubic root of 16800065 is about 256.1161633052.

The spelling of 16800065 in words is "sixteen million, eight hundred thousand, sixty-five".