8166397727 has 2 divisors, whose sum is σ = 8166397728. Its totient is φ = 8166397726.

The previous prime is 8166397691. The next prime is 8166397769. The reversal of 8166397727 is 7277936618.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8166397727 - 2¹⁰ = 8166396703 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8166397787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4083198863 + 4083198864.

It is an arithmetic number, because the mean of its divisors is an integer number (4083198864).

Almost surely, 2^8166397727 is an apocalyptic number.

8166397727 is a deficient number, since it is larger than the sum of its proper divisors (1).

8166397727 is an equidigital number, since it uses as much as digits as its factorization.

8166397727 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5334336, while the sum is 56.

The square root of 8166397727 is about 90368.1234008984. The cubic root of 8166397727 is about 2013.7714334121.

The spelling of 8166397727 in words is "eight billion, one hundred sixty-six million, three hundred ninety-seven thousand, seven hundred twenty-seven".