7981166 has 16 divisors (see below), whose sum is σ = 12268800. Its totient is φ = 3892728.

The previous prime is 7981151. The next prime is 7981189. The reversal of 7981166 is 6611897.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 28061 + ... + 28343.

It is an arithmetic number, because the mean of its divisors is an integer number (766800).

Almost surely, 2^7981166 is an apocalyptic number.

7981166 is a deficient number, since it is larger than the sum of its proper divisors (4287634).

7981166 is a wasteful number, since it uses less digits than its factorization.

7981166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 583.

The product of its digits is 18144, while the sum is 38.

The square root of 7981166 is about 2825.0957505897. The cubic root of 7981166 is about 199.8429266721.

The spelling of 7981166 in words is "seven million, nine hundred eighty-one thousand, one hundred sixty-six".