6566820341 has 2 divisors, whose sum is σ = 6566820342. Its totient is φ = 6566820340.

The previous prime is 6566820329. The next prime is 6566820433. The reversal of 6566820341 is 1430286656.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6444717841 + 122102500 = 80279^2 + 11050^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6566820341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6566820941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3283410170 + 3283410171.

It is an arithmetic number, because the mean of its divisors is an integer number (3283410171).

Almost surely, 2^6566820341 is an apocalyptic number.

It is an amenable number.

6566820341 is a deficient number, since it is larger than the sum of its proper divisors (1).

6566820341 is an equidigital number, since it uses as much as digits as its factorization.

6566820341 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 207360, while the sum is 41.

The square root of 6566820341 is about 81035.9200663508. The cubic root of 6566820341 is about 1872.6288572485.

The spelling of 6566820341 in words is "six billion, five hundred sixty-six million, eight hundred twenty thousand, three hundred forty-one".