166724 has 6 divisors (see below), whose sum is σ = 291774. Its totient is φ = 83360.

The previous prime is 166723. The next prime is 166739. The reversal of 166724 is 427661.

It can be written as a sum of positive squares in only one way, i.e., 160000 + 6724 = 400^2 + 82^2 .

It is a plaindrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 166693 and 166702.

It is not an unprimeable number, because it can be changed into a prime (166723) 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 as a sum of consecutive naturals, namely, 20837 + ... + 20844.

It is an arithmetic number, because the mean of its divisors is an integer number (48629).

2¹⁶⁶⁷²⁴ is an apocalyptic number.

It is an amenable number.

166724 is a deficient number, since it is larger than the sum of its proper divisors (125050).

166724 is a wasteful number, since it uses less digits than its factorization.

166724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41685 (or 41683 counting only the distinct ones).

The product of its digits is 2016, while the sum is 26.

The square root of 166724 is about 408.3185031321. The cubic root of 166724 is about 55.0384304413.

It can be divided in two parts, 16 and 6724, that multiplied together give a square (107584 = 328²).

The spelling of 166724 in words is "one hundred sixty-six thousand, seven hundred twenty-four".