1161331066 has 24 divisors (see below), whose sum is σ = 2028049056. Its totient is φ = 497309400.

The previous prime is 1161331051. The next prime is 1161331069. The reversal of 1161331066 is 6601331611.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1161331069) 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 11 ways as a sum of consecutive naturals, for example, 138115 + ... + 146281.

It is an arithmetic number, because the mean of its divisors is an integer number (84502044).

Almost surely, 2^1161331066 is an apocalyptic number.

1161331066 is a deficient number, since it is larger than the sum of its proper divisors (866717990).

1161331066 is a wasteful number, since it uses less digits than its factorization.

1161331066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9634 (or 9627 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 1161331066 is about 34078.3078511830. The cubic root of 1161331066 is about 1051.1193100844.

Adding to 1161331066 its reverse (6601331611), we get a palindrome (7762662677).

The spelling of 1161331066 in words is "one billion, one hundred sixty-one million, three hundred thirty-one thousand, sixty-six".