166145 has 16 divisors (see below), whose sum is σ = 235008. Its totient is φ = 110400.
The previous prime is 166099. The next prime is 166147. The reversal of 166145 is 541661.
It is not a de Polignac number, because 166145 - 26 = 166081 is a prime.
It is a super-2 number, since 2×1661452 = 55208322050, which contains 22 as substring.
It is a Duffinian number.
It is a self number, because there is not a number n which added to its sum of digits gives 166145.
It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 166145.
It is not an unprimeable number, because it can be changed into a prime (166147) by changing a digit.
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 in 15 ways as a sum of consecutive naturals, for example, 1595 + ... + 1695.
It is an arithmetic number, because the mean of its divisors is an integer number (14688).
2166145 is an apocalyptic number.
It is an amenable number.
166145 is a deficient number, since it is larger than the sum of its proper divisors (68863).
166145 is a wasteful number, since it uses less digits than its factorization.
166145 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 160.
The product of its digits is 720, while the sum is 23.
The square root of 166145 is about 407.6088811594. The cubic root of 166145 is about 54.9746439596.
The spelling of 166145 in words is "one hundred sixty-six thousand, one hundred forty-five".
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