1161328166 has 4 divisors (see below), whose sum is σ = 1741992252. Its totient is φ = 580664082.

The previous prime is 1161328117. The next prime is 1161328177. The reversal of 1161328166 is 6618231611.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 290332040 + ... + 290332043.

It is an arithmetic number, because the mean of its divisors is an integer number (435498063).

Almost surely, 2^1161328166 is an apocalyptic number.

1161328166 is a deficient number, since it is larger than the sum of its proper divisors (580664086).

1161328166 is an equidigital number, since it uses as much as digits as its factorization.

1161328166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 580664085.

The product of its digits is 10368, while the sum is 35.

The square root of 1161328166 is about 34078.2653020954. The cubic root of 1161328166 is about 1051.1184351549.

Adding to 1161328166 its reverse (6618231611), we get a palindrome (7779559777).

The spelling of 1161328166 in words is "one billion, one hundred sixty-one million, three hundred twenty-eight thousand, one hundred sixty-six".