2166685005 has 8 divisors (see below), whose sum is σ = 3466696032. Its totient is φ = 1155565328.

The previous prime is 2166684973. The next prime is 2166685009. The reversal of 2166685005 is 5005866612.

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 2166685005 - 2⁵ = 2166684973 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2166685009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72222819 + ... + 72222848.

It is an arithmetic number, because the mean of its divisors is an integer number (433337004).

Almost surely, 2^2166685005 is an apocalyptic number.

It is an amenable number.

2166685005 is a deficient number, since it is larger than the sum of its proper divisors (1300011027).

2166685005 is a wasteful number, since it uses less digits than its factorization.

2166685005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144445675.

The product of its (nonzero) digits is 86400, while the sum is 39.

The square root of 2166685005 is about 46547.6637974453. The cubic root of 2166685005 is about 1293.9929968080.

The spelling of 2166685005 in words is "two billion, one hundred sixty-six million, six hundred eighty-five thousand, five".