2081666837 has 2 divisors, whose sum is σ = 2081666838. Its totient is φ = 2081666836.

The previous prime is 2081666831. The next prime is 2081666869. The reversal of 2081666837 is 7386661802.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1628445316 + 453221521 = 40354^2 + 21289^2 .

It is a cyclic number.

It is not a de Polignac number, because 2081666837 - 2¹⁴ = 2081650453 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2081666791 and 2081666800.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2081666831) 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, 1040833418 + 1040833419.

It is an arithmetic number, because the mean of its divisors is an integer number (1040833419).

Almost surely, 2^2081666837 is an apocalyptic number.

It is an amenable number.

2081666837 is a deficient number, since it is larger than the sum of its proper divisors (1).

2081666837 is an equidigital number, since it uses as much as digits as its factorization.

2081666837 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 580608, while the sum is 47.

The square root of 2081666837 is about 45625.2872538902. The cubic root of 2081666837 is about 1276.8417493164.

The spelling of 2081666837 in words is "two billion, eighty-one million, six hundred sixty-six thousand, eight hundred thirty-seven".