2166846191 has 2 divisors, whose sum is σ = 2166846192. Its totient is φ = 2166846190.

The previous prime is 2166846181. The next prime is 2166846211. The reversal of 2166846191 is 1916486612.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2166846191 - 2¹⁰ = 2166845167 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2166846131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1083423095 + 1083423096.

It is an arithmetic number, because the mean of its divisors is an integer number (1083423096).

Almost surely, 2^2166846191 is an apocalyptic number.

2166846191 is a deficient number, since it is larger than the sum of its proper divisors (1).

2166846191 is an equidigital number, since it uses as much as digits as its factorization.

2166846191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 124416, while the sum is 44.

The square root of 2166846191 is about 46549.3951732995. The cubic root of 2166846191 is about 1294.0250839800.

The spelling of 2166846191 in words is "two billion, one hundred sixty-six million, eight hundred forty-six thousand, one hundred ninety-one".