10664581 has 2 divisors, whose sum is σ = 10664582. Its totient is φ = 10664580.

The previous prime is 10664561. The next prime is 10664639. The reversal of 10664581 is 18546601.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10660225 + 4356 = 3265^2 + 66^2 .

It is a cyclic number.

It is not a de Polignac number, because 10664581 - 2¹⁹ = 10140293 is a prime.

It is a super-2 number, since 2×10664581² = 227466575811122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10664561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5332290 + 5332291.

It is an arithmetic number, because the mean of its divisors is an integer number (5332291).

Almost surely, 2^10664581 is an apocalyptic number.

It is an amenable number.

10664581 is a deficient number, since it is larger than the sum of its proper divisors (1).

10664581 is an equidigital number, since it uses as much as digits as its factorization.

10664581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 10664581 is about 3265.6670069069. The cubic root of 10664581 is about 220.1141349919.

The spelling of 10664581 in words is "ten million, six hundred sixty-four thousand, five hundred eighty-one".