8666804513 has 2 divisors, whose sum is σ = 8666804514. Its totient is φ = 8666804512.

The previous prime is 8666804507. The next prime is 8666804521. The reversal of 8666804513 is 3154086668.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6990966544 + 1675837969 = 83612^2 + 40937^2 .

It is a cyclic number.

It is not a de Polignac number, because 8666804513 - 2⁶ = 8666804449 is a prime.

It is a super-2 number, since 2×8666804513² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (8666801513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4333402256 + 4333402257.

It is an arithmetic number, because the mean of its divisors is an integer number (4333402257).

Almost surely, 2^8666804513 is an apocalyptic number.

It is an amenable number.

8666804513 is a deficient number, since it is larger than the sum of its proper divisors (1).

8666804513 is an equidigital number, since it uses as much as digits as its factorization.

8666804513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 829440, while the sum is 47.

The square root of 8666804513 is about 93095.6739757546. The cubic root of 8666804513 is about 2054.0909394767.

The spelling of 8666804513 in words is "eight billion, six hundred sixty-six million, eight hundred four thousand, five hundred thirteen".