6006216581 has 2 divisors, whose sum is σ = 6006216582. Its totient is φ = 6006216580.

The previous prime is 6006216563. The next prime is 6006216599. The reversal of 6006216581 is 1856126006.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (6006216563) and next prime (6006216599).

It can be written as a sum of positive squares in only one way, i.e., 5211540481 + 794676100 = 72191^2 + 28190^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6006216581 is a prime.

It is a super-2 number, since 2×6006216581² = 72149275235758659122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6006213581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3003108290 + 3003108291.

It is an arithmetic number, because the mean of its divisors is an integer number (3003108291).

Almost surely, 2^6006216581 is an apocalyptic number.

It is an amenable number.

6006216581 is a deficient number, since it is larger than the sum of its proper divisors (1).

6006216581 is an equidigital number, since it uses as much as digits as its factorization.

6006216581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 6006216581 is about 77499.7843932485. The cubic root of 6006216581 is about 1817.7479471794.

The spelling of 6006216581 in words is "six billion, six million, two hundred sixteen thousand, five hundred eighty-one".