166725 has 48 divisors (see below), whose sum is σ = 347200. Its totient is φ = 77760.

The previous prime is 166723. The next prime is 166739. The reversal of 166725 is 527661.

166725 = T₁₀₀ + T₁₀₁ + ... + T₁₂₅.

166725 is nontrivially palindromic in base 2 and base 8.

It is not a de Polignac number, because 166725 - 2¹ = 166723 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an Ulam number.

Its product of digits (2520) is a multiple of the sum of its prime divisors (40).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166723) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8766 + ... + 8784.

2¹⁶⁶⁷²⁵ is an apocalyptic number.

166725 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

166725 is an abundant number, since it is smaller than the sum of its proper divisors (180475).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

166725 is a wasteful number, since it uses less digits than its factorization.

166725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51 (or 40 counting only the distinct ones).

The product of its digits is 2520, while the sum is 27.

The square root of 166725 is about 408.3197276645. The cubic root of 166725 is about 55.0385404801.

The spelling of 166725 in words is "one hundred sixty-six thousand, seven hundred twenty-five".