2164566 has 16 divisors (see below), whose sum is σ = 4345344. Its totient is φ = 718824.

The previous prime is 2164529. The next prime is 2164571. The reversal of 2164566 is 6654612.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1711 + ... + 2693.

It is an arithmetic number, because the mean of its divisors is an integer number (271584).

2^2164566 is an apocalyptic number.

2164566 is an abundant number, since it is smaller than the sum of its proper divisors (2180778).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2164566 is a wasteful number, since it uses less digits than its factorization.

2164566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1355.

The product of its digits is 8640, while the sum is 30.

The square root of 2164566 is about 1471.2464103610. The cubic root of 2164566 is about 129.3571020073.

Subtracting from 2164566 its product of digits (8640), we obtain a triangular number (2155926 = T₂₀₇₆).

The spelling of 2164566 in words is "two million, one hundred sixty-four thousand, five hundred sixty-six".