2166385895 has 8 divisors (see below), whose sum is σ = 2643725520. Its totient is φ = 1703733760.

The previous prime is 2166385877. The next prime is 2166385933. The reversal of 2166385895 is 5985836612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2166385895 - 2²⁰ = 2165337319 is a prime.

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, 3671546 + ... + 3672135.

It is an arithmetic number, because the mean of its divisors is an integer number (330465690).

Almost surely, 2^2166385895 is an apocalyptic number.

2166385895 is a deficient number, since it is larger than the sum of its proper divisors (477339625).

2166385895 is an equidigital number, since it uses as much as digits as its factorization.

2166385895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7343745.

The product of its digits is 3110400, while the sum is 53.

The square root of 2166385895 is about 46544.4507433486. The cubic root of 2166385895 is about 1293.9334489955.

The spelling of 2166385895 in words is "two billion, one hundred sixty-six million, three hundred eighty-five thousand, eight hundred ninety-five".