2660855 has 16 divisors (see below), whose sum is σ = 3456480. Its totient is φ = 1959552.

The previous prime is 2660849. The next prime is 2660863. The reversal of 2660855 is 5580662.

It is a happy number.

2660855 is nontrivially palindromic in base 9.

It is a cyclic number.

It is not a de Polignac number, because 2660855 - 2⁴ = 2660839 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3137 + ... + 3893.

It is an arithmetic number, because the mean of its divisors is an integer number (216030).

2^2660855 is an apocalyptic number.

2660855 is a deficient number, since it is larger than the sum of its proper divisors (795625).

2660855 is a wasteful number, since it uses less digits than its factorization.

2660855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 818.

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 2660855 is about 1631.2127390380. The cubic root of 2660855 is about 138.5714419831.

The spelling of 2660855 in words is "two million, six hundred sixty thousand, eight hundred fifty-five".