2166541870 has 16 divisors (see below), whose sum is σ = 3900563280. Its totient is φ = 866441664.

The previous prime is 2166541859. The next prime is 2166541901. The reversal of 2166541870 is 781456612.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 37849 + ... + 75931.

It is an arithmetic number, because the mean of its divisors is an integer number (243785205).

Almost surely, 2^2166541870 is an apocalyptic number.

2166541870 is a deficient number, since it is larger than the sum of its proper divisors (1734021410).

2166541870 is a wasteful number, since it uses less digits than its factorization.

2166541870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43779.

The product of its (nonzero) digits is 80640, while the sum is 40.

The square root of 2166541870 is about 46546.1262620210. The cubic root of 2166541870 is about 1293.9645017005.

The spelling of 2166541870 in words is "two billion, one hundred sixty-six million, five hundred forty-one thousand, eight hundred seventy".