2066165 has 4 divisors (see below), whose sum is σ = 2479404. Its totient is φ = 1652928.

The previous prime is 2066161. The next prime is 2066173. The reversal of 2066165 is 5616602.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5616602 = 2 ⋅2808301.

It can be written as a sum of positive squares in 2 ways, for example, as 1331716 + 734449 = 1154^2 + 857^2 .

It is a cyclic number.

It is not a de Polignac number, because 2066165 - 2² = 2066161 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2066161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 206612 + ... + 206621.

It is an arithmetic number, because the mean of its divisors is an integer number (619851).

2^2066165 is an apocalyptic number.

It is an amenable number.

2066165 is a deficient number, since it is larger than the sum of its proper divisors (413239).

2066165 is an equidigital number, since it uses as much as digits as its factorization.

2066165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 413238.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 2066165 is about 1437.4160845072. The cubic root of 2066165 is about 127.3664370923.

The spelling of 2066165 in words is "two million, sixty-six thousand, one hundred sixty-five".