2166671 has 4 divisors (see below), whose sum is σ = 2333352. Its totient is φ = 1999992.

The previous prime is 2166629. The next prime is 2166673. The reversal of 2166671 is 1766612.

2166671 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 a cyclic number.

It is not a de Polignac number, because 2166671 - 2⁶ = 2166607 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2166673) by changing a digit.

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, 83321 + ... + 83346.

It is an arithmetic number, because the mean of its divisors is an integer number (583338).

2^2166671 is an apocalyptic number.

2166671 is a deficient number, since it is larger than the sum of its proper divisors (166681).

2166671 is a wasteful number, since it uses less digits than its factorization.

2166671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166680.

The product of its digits is 3024, while the sum is 29.

The square root of 2166671 is about 1471.9616163474. The cubic root of 2166671 is about 129.3990208768.

The spelling of 2166671 in words is "two million, one hundred sixty-six thousand, six hundred seventy-one".