981166 has 8 divisors (see below), whose sum is σ = 1511640. Its totient is φ = 477288.

The previous prime is 981151. The next prime is 981173. The reversal of 981166 is 661189.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

981166 is an untouchable number, because it is not equal to the sum of proper divisors of any 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 3 ways as a sum of consecutive naturals, for example, 6556 + ... + 6703.

It is an arithmetic number, because the mean of its divisors is an integer number (188955).

2⁹⁸¹¹⁶⁶ is an apocalyptic number.

981166 is a deficient number, since it is larger than the sum of its proper divisors (530474).

981166 is a wasteful number, since it uses less digits than its factorization.

981166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13298.

The product of its digits is 2592, while the sum is 31.

The square root of 981166 is about 990.5382375254. The cubic root of 981166 is about 99.3682169071.

The spelling of 981166 in words is "nine hundred eighty-one thousand, one hundred sixty-six".