16050065665 has 4 divisors (see below), whose sum is σ = 19260078804. Its totient is φ = 12840052528.

The previous prime is 16050065651. The next prime is 16050065671. The reversal of 16050065665 is 56656005061.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56656005061 = 164569 ⋅344269.

It can be written as a sum of positive squares in 2 ways, for example, as 9858106944 + 6191958721 = 99288^2 + 78689^2 .

It is a cyclic number.

It is not a de Polignac number, because 16050065665 - 2⁹ = 16050065153 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1605006562 + ... + 1605006571.

It is an arithmetic number, because the mean of its divisors is an integer number (4815019701).

Almost surely, 2^16050065665 is an apocalyptic number.

It is an amenable number.

16050065665 is a deficient number, since it is larger than the sum of its proper divisors (3210013139).

16050065665 is an equidigital number, since it uses as much as digits as its factorization.

16050065665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3210013138.

The product of its (nonzero) digits is 162000, while the sum is 40.

The spelling of 16050065665 in words is "sixteen billion, fifty million, sixty-five thousand, six hundred sixty-five".