866757222445399 has 2 divisors, whose sum is σ = 866757222445400. Its totient is φ = 866757222445398.

The previous prime is 866757222445339. The next prime is 866757222445481. The reversal of 866757222445399 is 993544222757668.

866757222445399 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 866757222445399 - 2⁹ = 866757222444887 is a prime.

It is a super-2 number, since 2×866757222445399² (a number of 31 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (866757222445319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433378611222699 + 433378611222700.

It is an arithmetic number, because the mean of its divisors is an integer number (433378611222700).

Almost surely, 2^{866757222445399} is an apocalyptic number.

866757222445399 is a deficient number, since it is larger than the sum of its proper divisors (1).

866757222445399 is an equidigital number, since it uses as much as digits as its factorization.

866757222445399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10973491200, while the sum is 79.

The spelling of 866757222445399 in words is "eight hundred sixty-six trillion, seven hundred fifty-seven billion, two hundred twenty-two million, four hundred forty-five thousand, three hundred ninety-nine".