166916 has 6 divisors (see below), whose sum is σ = 292110. Its totient is φ = 83456.

The previous prime is 166909. The next prime is 166919. The reversal of 166916 is 619661.

It can be written as a sum of positive squares in only one way, i.e., 102400 + 64516 = 320^2 + 254^2 .

It is not an unprimeable number, because it can be changed into a prime (166919) by changing a digit.

166916 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 (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20861 + ... + 20868.

It is an arithmetic number, because the mean of its divisors is an integer number (48685).

2¹⁶⁶⁹¹⁶ is an apocalyptic number.

It is an amenable number.

166916 is a deficient number, since it is larger than the sum of its proper divisors (125194).

166916 is a wasteful number, since it uses less digits than its factorization.

166916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41733 (or 41731 counting only the distinct ones).

The product of its digits is 1944, while the sum is 29.

The square root of 166916 is about 408.5535460622. The cubic root of 166916 is about 55.0595498258.

The spelling of 166916 in words is "one hundred sixty-six thousand, nine hundred sixteen".