2166249585 has 16 divisors (see below), whose sum is σ = 3474918720. Its totient is φ = 1152360000.

The previous prime is 2166249583. The next prime is 2166249593. The reversal of 2166249585 is 5859426612.

It is not a de Polignac number, because 2166249585 - 2¹ = 2166249583 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2166249583) by changing a digit.

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, 179791 + ... + 191460.

It is an arithmetic number, because the mean of its divisors is an integer number (217182420).

Almost surely, 2^2166249585 is an apocalyptic number.

It is an amenable number.

2166249585 is a deficient number, since it is larger than the sum of its proper divisors (1308669135).

2166249585 is a wasteful number, since it uses less digits than its factorization.

2166249585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 371648.

The product of its digits is 1036800, while the sum is 48.

The square root of 2166249585 is about 46542.9864211569. The cubic root of 2166249585 is about 1293.9063101298.

The spelling of 2166249585 in words is "two billion, one hundred sixty-six million, two hundred forty-nine thousand, five hundred eighty-five".