6643296041 has 2 divisors, whose sum is σ = 6643296042. Its totient is φ = 6643296040.

The previous prime is 6643296031. The next prime is 6643296043. The reversal of 6643296041 is 1406923466.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4219801600 + 2423494441 = 64960^2 + 49229^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6643296041 is a prime.

It is a Sophie Germain prime.

Together with 6643296043, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 6643296041.

It is not a weakly prime, because it can be changed into another prime (6643296043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3321648020 + 3321648021.

It is an arithmetic number, because the mean of its divisors is an integer number (3321648021).

Almost surely, 2^6643296041 is an apocalyptic number.

It is an amenable number.

6643296041 is a deficient number, since it is larger than the sum of its proper divisors (1).

6643296041 is an equidigital number, since it uses as much as digits as its factorization.

6643296041 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 186624, while the sum is 41.

The square root of 6643296041 is about 81506.4171768088. The cubic root of 6643296041 is about 1879.8702227641.

The spelling of 6643296041 in words is "six billion, six hundred forty-three million, two hundred ninety-six thousand, forty-one".