2666065 has 4 divisors (see below), whose sum is σ = 3199284. Its totient is φ = 2132848.

The previous prime is 2666051. The next prime is 2666071. The reversal of 2666065 is 5606662.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5606662 = 2 ⋅2803331.

It can be written as a sum of positive squares in 2 ways, for example, as 1697809 + 968256 = 1303^2 + 984^2 .

It is a cyclic number.

It is not a de Polignac number, because 2666065 - 2¹¹ = 2664017 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, 266602 + ... + 266611.

It is an arithmetic number, because the mean of its divisors is an integer number (799821).

2^2666065 is an apocalyptic number.

It is an amenable number.

2666065 is a deficient number, since it is larger than the sum of its proper divisors (533219).

2666065 is an equidigital number, since it uses as much as digits as its factorization.

2666065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 533218.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 2666065 is about 1632.8089294219. The cubic root of 2666065 is about 138.6618247765.

The spelling of 2666065 in words is "two million, six hundred sixty-six thousand, sixty-five".