6866846561 has 2 divisors, whose sum is σ = 6866846562. Its totient is φ = 6866846560.

The previous prime is 6866846557. The next prime is 6866846603. The reversal of 6866846561 is 1656486686.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6701878225 + 164968336 = 81865^2 + 12844^2 .

It is a cyclic number.

It is not a de Polignac number, because 6866846561 - 2² = 6866846557 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6866846497 and 6866846506.

It is not a weakly prime, because it can be changed into another prime (6866846521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3433423280 + 3433423281.

It is an arithmetic number, because the mean of its divisors is an integer number (3433423281).

Almost surely, 2^6866846561 is an apocalyptic number.

It is an amenable number.

6866846561 is a deficient number, since it is larger than the sum of its proper divisors (1).

6866846561 is an equidigital number, since it uses as much as digits as its factorization.

6866846561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9953280, while the sum is 56.

The square root of 6866846561 is about 82866.4380856327. The cubic root of 6866846561 is about 1900.7242447642.

The spelling of 6866846561 in words is "six billion, eight hundred sixty-six million, eight hundred forty-six thousand, five hundred sixty-one".