6647646041 has 2 divisors, whose sum is σ = 6647646042. Its totient is φ = 6647646040.

The previous prime is 6647646013. The next prime is 6647646067. The reversal of 6647646041 is 1406467466.

6647646041 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4897060441 + 1750585600 = 69979^2 + 41840^2 .

It is a cyclic number.

It is not a de Polignac number, because 6647646041 - 2¹⁴ = 6647629657 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 6647645983 and 6647646001.

It is not a weakly prime, because it can be changed into another prime (6647648041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3323823020 + 3323823021.

It is an arithmetic number, because the mean of its divisors is an integer number (3323823021).

Almost surely, 2^6647646041 is an apocalyptic number.

It is an amenable number.

6647646041 is a deficient number, since it is larger than the sum of its proper divisors (1).

6647646041 is an equidigital number, since it uses as much as digits as its factorization.

6647646041 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 580608, while the sum is 44.

The square root of 6647646041 is about 81533.0978253617. The cubic root of 6647646041 is about 1880.2804433945.

The spelling of 6647646041 in words is "six billion, six hundred forty-seven million, six hundred forty-six thousand, forty-one".