2166655 has 8 divisors (see below), whose sum is σ = 2619792. Its totient is φ = 1720128.

The previous prime is 2166629. The next prime is 2166673. The reversal of 2166655 is 5566612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2166655 - 2¹¹ = 2164607 is a prime.

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 (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 897 + ... + 2266.

It is an arithmetic number, because the mean of its divisors is an integer number (327474).

2^2166655 is an apocalyptic number.

2166655 is a deficient number, since it is larger than the sum of its proper divisors (453137).

2166655 is a wasteful number, since it uses less digits than its factorization.

2166655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3305.

The product of its digits is 10800, while the sum is 31.

The square root of 2166655 is about 1471.9561814130. The cubic root of 2166655 is about 129.3987023560.

The spelling of 2166655 in words is "two million, one hundred sixty-six thousand, six hundred fifty-five".