1166221733 has 2 divisors, whose sum is σ = 1166221734. Its totient is φ = 1166221732.

The previous prime is 1166221717. The next prime is 1166221741. The reversal of 1166221733 is 3371226611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1138522564 + 27699169 = 33742^2 + 5263^2 .

It is a cyclic number.

It is not a de Polignac number, because 1166221733 - 2⁴ = 1166221717 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1166221733.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1166221703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 583110866 + 583110867.

It is an arithmetic number, because the mean of its divisors is an integer number (583110867).

Almost surely, 2^1166221733 is an apocalyptic number.

It is an amenable number.

1166221733 is a deficient number, since it is larger than the sum of its proper divisors (1).

1166221733 is an equidigital number, since it uses as much as digits as its factorization.

1166221733 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9072, while the sum is 32.

The square root of 1166221733 is about 34149.9887701299. The cubic root of 1166221733 is about 1052.5927558772.

The spelling of 1166221733 in words is "one billion, one hundred sixty-six million, two hundred twenty-one thousand, seven hundred thirty-three".