2166755 has 4 divisors (see below), whose sum is σ = 2600112. Its totient is φ = 1733400.

The previous prime is 2166721. The next prime is 2166763. The reversal of 2166755 is 5576612.

It is a happy number.

2166755 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 2166755 - 2⁶ = 2166691 is a prime.

It is a Duffinian 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, 216671 + ... + 216680.

It is an arithmetic number, because the mean of its divisors is an integer number (650028).

2^2166755 is an apocalyptic number.

2166755 is a deficient number, since it is larger than the sum of its proper divisors (433357).

2166755 is an equidigital number, since it uses as much as digits as its factorization.

2166755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 433356.

The product of its digits is 12600, while the sum is 32.

The square root of 2166755 is about 1471.9901494236. The cubic root of 2166755 is about 129.4006930854.

The spelling of 2166755 in words is "two million, one hundred sixty-six thousand, seven hundred fifty-five".