1166461081 has 2 divisors, whose sum is σ = 1166461082. Its totient is φ = 1166461080.

The previous prime is 1166461057. The next prime is 1166461151. The reversal of 1166461081 is 1801646611.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 712089225 + 454371856 = 26685^2 + 21316^2 .

It is a cyclic number.

It is not a de Polignac number, because 1166461081 - 2⁹ = 1166460569 is a prime.

It is a super-2 number, since 2×1166461081² = 2721262906975377122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1166461381) 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, 583230540 + 583230541.

It is an arithmetic number, because the mean of its divisors is an integer number (583230541).

Almost surely, 2^1166461081 is an apocalyptic number.

It is an amenable number.

1166461081 is a deficient number, since it is larger than the sum of its proper divisors (1).

1166461081 is an equidigital number, since it uses as much as digits as its factorization.

1166461081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 1166461081 is about 34153.4929546013. The cubic root of 1166461081 is about 1052.6647601198.

The spelling of 1166461081 in words is "one billion, one hundred sixty-six million, four hundred sixty-one thousand, eighty-one".