9161691166 has 4 divisors (see below), whose sum is σ = 13742536752. Its totient is φ = 4580845582.

The previous prime is 9161691157. The next prime is 9161691181. The reversal of 9161691166 is 6611961619.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2290422790 + ... + 2290422793.

It is an arithmetic number, because the mean of its divisors is an integer number (3435634188).

Almost surely, 2^9161691166 is an apocalyptic number.

9161691166 is a deficient number, since it is larger than the sum of its proper divisors (4580845586).

9161691166 is a wasteful number, since it uses less digits than its factorization.

9161691166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4580845585.

The product of its digits is 104976, while the sum is 46.

The square root of 9161691166 is about 95716.7235440077. The cubic root of 9161691166 is about 2092.4666713506.

It can be divided in two parts, 916169 and 1166, that added together give a triangular number (917335 = T₁₃₅₄).

The spelling of 9161691166 in words is "nine billion, one hundred sixty-one million, six hundred ninety-one thousand, one hundred sixty-six".