2666855 has 4 divisors (see below), whose sum is σ = 3200232. Its totient is φ = 2133480.

The previous prime is 2666819. The next prime is 2666861. The reversal of 2666855 is 5586662.

It is a happy number.

2666855 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2666855 - 2⁶ = 2666791 is a prime.

It is a super-2 number, since 2×2666855² = 14224231182050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 266681 + ... + 266690.

It is an arithmetic number, because the mean of its divisors is an integer number (800058).

2^2666855 is an apocalyptic number.

2666855 is a deficient number, since it is larger than the sum of its proper divisors (533377).

2666855 is an equidigital number, since it uses as much as digits as its factorization.

2666855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 533376.

The product of its digits is 86400, while the sum is 38.

The square root of 2666855 is about 1633.0508259084. The cubic root of 2666855 is about 138.6755193693.

The spelling of 2666855 in words is "two million, six hundred sixty-six thousand, eight hundred fifty-five".