6866432161 has 2 divisors, whose sum is σ = 6866432162. Its totient is φ = 6866432160.

The previous prime is 6866432159. The next prime is 6866432171. The reversal of 6866432161 is 1612346686.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3714171136 + 3152261025 = 60944^2 + 56145^2 .

It is a cyclic number.

It is not a de Polignac number, because 6866432161 - 2¹ = 6866432159 is a prime.

Together with 6866432159, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (6866432101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3433216080 + 3433216081.

It is an arithmetic number, because the mean of its divisors is an integer number (3433216081).

Almost surely, 2^6866432161 is an apocalyptic number.

It is an amenable number.

6866432161 is a deficient number, since it is larger than the sum of its proper divisors (1).

6866432161 is an equidigital number, since it uses as much as digits as its factorization.

6866432161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 248832, while the sum is 43.

The square root of 6866432161 is about 82863.9376387582. The cubic root of 6866432161 is about 1900.6860090682.

The spelling of 6866432161 in words is "six billion, eight hundred sixty-six million, four hundred thirty-two thousand, one hundred sixty-one".