1166622217 has 2 divisors, whose sum is σ = 1166622218. Its totient is φ = 1166622216.

The previous prime is 1166622199. The next prime is 1166622221. The reversal of 1166622217 is 7122266611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1130909641 + 35712576 = 33629^2 + 5976^2 .

It is a cyclic number.

It is not a de Polignac number, because 1166622217 - 2⁷ = 1166622089 is a prime.

It is a super-2 number, since 2×1166622217² = 2722014794395990178, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1166622227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 583311108 + 583311109.

It is an arithmetic number, because the mean of its divisors is an integer number (583311109).

Almost surely, 2^1166622217 is an apocalyptic number.

It is an amenable number.

1166622217 is a deficient number, since it is larger than the sum of its proper divisors (1).

1166622217 is an equidigital number, since it uses as much as digits as its factorization.

1166622217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12096, while the sum is 34.

The square root of 1166622217 is about 34155.8518705068. The cubic root of 1166622217 is about 1052.7132299120.

Adding to 1166622217 its reverse (7122266611), we get a palindrome (8288888828).

The spelling of 1166622217 in words is "one billion, one hundred sixty-six million, six hundred twenty-two thousand, two hundred seventeen".