1166320331 has 6 divisors (see below), whose sum is σ = 1281988596. Its totient is φ = 1060291100.

The previous prime is 1166320321. The next prime is 1166320333. The reversal of 1166320331 is 1330236611.

It is not a de Polignac number, because 1166320331 - 2¹⁴ = 1166303947 is a prime.

It is a super-2 number, since 2×1166320331² = 2720606229007899122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1166320331.

It is not an unprimeable number, because it can be changed into a prime (1166320333) 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 in 5 ways as a sum of consecutive naturals, for example, 4819385 + ... + 4819626.

It is an arithmetic number, because the mean of its divisors is an integer number (213664766).

Almost surely, 2^1166320331 is an apocalyptic number.

1166320331 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1166320331 is a deficient number, since it is larger than the sum of its proper divisors (115668265).

1166320331 is an equidigital number, since it uses as much as digits as its factorization.

1166320331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9639033 (or 9639022 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 26.

The square root of 1166320331 is about 34151.4323418506. The cubic root of 1166320331 is about 1052.6224187944.

Adding to 1166320331 its reverse (1330236611), we get a palindrome (2496556942).

The spelling of 1166320331 in words is "one billion, one hundred sixty-six million, three hundred twenty thousand, three hundred thirty-one".