2086466581 has 2 divisors, whose sum is σ = 2086466582. Its totient is φ = 2086466580.

The previous prime is 2086466561. The next prime is 2086466587. The reversal of 2086466581 is 1856646802.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1506138481 + 580328100 = 38809^2 + 24090^2 .

It is a cyclic number.

It is not a de Polignac number, because 2086466581 - 2⁵ = 2086466549 is a prime.

It is a super-2 number, since 2×2086466581² = 8706685587259659122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2086466587) 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, 1043233290 + 1043233291.

It is an arithmetic number, because the mean of its divisors is an integer number (1043233291).

Almost surely, 2^2086466581 is an apocalyptic number.

It is an amenable number.

2086466581 is a deficient number, since it is larger than the sum of its proper divisors (1).

2086466581 is an equidigital number, since it uses as much as digits as its factorization.

2086466581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 552960, while the sum is 46.

The square root of 2086466581 is about 45677.8565718664. The cubic root of 2086466581 is about 1277.8223432049.

The spelling of 2086466581 in words is "two billion, eighty-six million, four hundred sixty-six thousand, five hundred eighty-one".