2165066065 has 16 divisors (see below), whose sum is σ = 2671833600. Its totient is φ = 1683544192.

The previous prime is 2165066003. The next prime is 2165066081. The reversal of 2165066065 is 5606605612.

It is a cyclic number.

It is not a de Polignac number, because 2165066065 - 2³¹ = 17582417 is a prime.

It is a super-2 number, since 2×2165066065² = 9375022131629168450, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14977 + ... + 67486.

It is an arithmetic number, because the mean of its divisors is an integer number (166989600).

Almost surely, 2^2165066065 is an apocalyptic number.

It is an amenable number.

2165066065 is a deficient number, since it is larger than the sum of its proper divisors (506767535).

2165066065 is an equidigital number, since it uses as much as digits as its factorization.

2165066065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82616.

The product of its (nonzero) digits is 64800, while the sum is 37.

The square root of 2165066065 is about 46530.2704161495. The cubic root of 2165066065 is about 1293.6706273818.

The spelling of 2165066065 in words is "two billion, one hundred sixty-five million, sixty-six thousand, sixty-five".