6566772156223 has 2 divisors, whose sum is σ = 6566772156224. Its totient is φ = 6566772156222.

The previous prime is 6566772156073. The next prime is 6566772156227. The reversal of 6566772156223 is 3226512776656.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6566772156223 - 2¹³ = 6566772148031 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6566772156227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3283386078111 + 3283386078112.

It is an arithmetic number, because the mean of its divisors is an integer number (3283386078112).

Almost surely, 2^{6566772156223} is an apocalyptic number.

6566772156223 is a deficient number, since it is larger than the sum of its proper divisors (1).

6566772156223 is an equidigital number, since it uses as much as digits as its factorization.

6566772156223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 38102400, while the sum is 58.

The spelling of 6566772156223 in words is "six trillion, five hundred sixty-six billion, seven hundred seventy-two million, one hundred fifty-six thousand, two hundred twenty-three".