2665855 has 16 divisors (see below), whose sum is σ = 3438720. Its totient is φ = 1976832.

The previous prime is 2665849. The next prime is 2665867. The reversal of 2665855 is 5585662.

It is a cyclic number.

It is not a de Polignac number, because 2665855 - 2⁵ = 2665823 is a prime.

It is a congruent number.

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, 6517 + ... + 6913.

It is an arithmetic number, because the mean of its divisors is an integer number (214920).

2^2665855 is an apocalyptic number.

2665855 is a deficient number, since it is larger than the sum of its proper divisors (772865).

2665855 is a wasteful number, since it uses less digits than its factorization.

2665855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 498.

The product of its digits is 72000, while the sum is 37.

The square root of 2665855 is about 1632.7446217948. The cubic root of 2665855 is about 138.6581839866.

The spelling of 2665855 in words is "two million, six hundred sixty-five thousand, eight hundred fifty-five".