7666191161 has 8 divisors (see below), whose sum is σ = 7738695360. Its totient is φ = 7593726672.

The previous prime is 7666191149. The next prime is 7666191163. The reversal of 7666191161 is 1611916667.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7666191161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7666191163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 500726 + ... + 515808.

It is an arithmetic number, because the mean of its divisors is an integer number (967336920).

Almost surely, 2^7666191161 is an apocalyptic number.

It is an amenable number.

7666191161 is a deficient number, since it is larger than the sum of its proper divisors (72504199).

7666191161 is a wasteful number, since it uses less digits than its factorization.

7666191161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19855.

The product of its digits is 81648, while the sum is 44.

The square root of 7666191161 is about 87556.7882062836. The cubic root of 7666191161 is about 1971.7864665202.

The spelling of 7666191161 in words is "seven billion, six hundred sixty-six million, one hundred ninety-one thousand, one hundred sixty-one".