2666885 has 16 divisors (see below), whose sum is σ = 3492720. Its totient is φ = 1943040.

The previous prime is 2666863. The next prime is 2666887. The reversal of 2666885 is 5886662.

It can be written as a sum of positive squares in 8 ways, for example, as 667489 + 1999396 = 817^2 + 1414^2 .

It is not a de Polignac number, because 2666885 - 2¹² = 2662789 is a prime.

It is a super-2 number, since 2×2666885² = 14224551206450, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2666887) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5555 + ... + 6015.

It is an arithmetic number, because the mean of its divisors is an integer number (218295).

2^2666885 is an apocalyptic number.

It is an amenable number.

2666885 is a deficient number, since it is larger than the sum of its proper divisors (825835).

2666885 is a wasteful number, since it uses less digits than its factorization.

2666885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 568.

The product of its digits is 138240, while the sum is 41.

The square root of 2666885 is about 1633.0600111447. The cubic root of 2666885 is about 138.6760393638.

The spelling of 2666885 in words is "two million, six hundred sixty-six thousand, eight hundred eighty-five".