166425 has 24 divisors (see below), whose sum is σ = 315456. Its totient is φ = 75840.

The previous prime is 166417. The next prime is 166429. The reversal of 166425 is 524661.

It is not a de Polignac number, because 166425 - 2³ = 166417 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 166395 and 166404.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 166425.

It is not an unprimeable number, because it can be changed into a prime (166429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 367 + ... + 683.

It is an arithmetic number, because the mean of its divisors is an integer number (13144).

2¹⁶⁶⁴²⁵ is an apocalyptic number.

166425 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

166425 is a deficient number, since it is larger than the sum of its proper divisors (149031).

166425 is a wasteful number, since it uses less digits than its factorization.

166425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 337 (or 332 counting only the distinct ones).

The product of its digits is 1440, while the sum is 24.

The square root of 166425 is about 407.9522030827. The cubic root of 166425 is about 55.0055090900.

It can be divided in two parts, 16 and 6425, that added together give a triangular number (6441 = T₁₁₃).

The spelling of 166425 in words is "one hundred sixty-six thousand, four hundred twenty-five".