16665065 has 8 divisors (see below), whose sum is σ = 20486088. Its totient is φ = 13006720.

The previous prime is 16665043. The next prime is 16665137. The reversal of 16665065 is 56056661.

It can be written as a sum of positive squares in 4 ways, for example, as 375769 + 16289296 = 613^2 + 4036^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 16665065 - 2⁶ = 16665001 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40442 + ... + 40851.

It is an arithmetic number, because the mean of its divisors is an integer number (2560761).

Almost surely, 2^16665065 is an apocalyptic number.

It is an amenable number.

16665065 is a deficient number, since it is larger than the sum of its proper divisors (3821023).

16665065 is an equidigital number, since it uses as much as digits as its factorization.

16665065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81339.

The product of its (nonzero) digits is 32400, while the sum is 35.

The square root of 16665065 is about 4082.2867366220. The cubic root of 16665065 is about 255.4282947206.

The spelling of 16665065 in words is "sixteen million, six hundred sixty-five thousand, sixty-five".