6466581089 has 2 divisors, whose sum is σ = 6466581090. Its totient is φ = 6466581088.

The previous prime is 6466581083. The next prime is 6466581113. The reversal of 6466581089 is 9801856646.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4229291089 + 2237290000 = 65033^2 + 47300^2 .

It is a cyclic number.

It is not a de Polignac number, because 6466581089 - 2⁴ = 6466581073 is a prime.

It is a super-2 number, since 2×6466581089² = 83633341961224851842, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6466581089.

It is not a weakly prime, because it can be changed into another prime (6466581083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3233290544 + 3233290545.

It is an arithmetic number, because the mean of its divisors is an integer number (3233290545).

Almost surely, 2^6466581089 is an apocalyptic number.

It is an amenable number.

6466581089 is a deficient number, since it is larger than the sum of its proper divisors (1).

6466581089 is an equidigital number, since it uses as much as digits as its factorization.

6466581089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2488320, while the sum is 53.

The square root of 6466581089 is about 80415.0551140767. The cubic root of 6466581089 is about 1863.0517106396.

The spelling of 6466581089 in words is "six billion, four hundred sixty-six million, five hundred eighty-one thousand, eighty-nine".