166901 has 8 divisors (see below), whose sum is σ = 193344. Its totient is φ = 141120.

The previous prime is 166871. The next prime is 166909. The reversal of 166901 is 109661.

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

It is not a de Polignac number, because 166901 - 2¹⁰ = 165877 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166909) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 686 + ... + 896.

It is an arithmetic number, because the mean of its divisors is an integer number (24168).

2¹⁶⁶⁹⁰¹ is an apocalyptic number.

It is an amenable number.

166901 is a deficient number, since it is larger than the sum of its proper divisors (26443).

166901 is a wasteful number, since it uses less digits than its factorization.

166901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331.

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 166901 is about 408.5351882029. The cubic root of 166901 is about 55.0579004572.

The spelling of 166901 in words is "one hundred sixty-six thousand, nine hundred one".