166529 has 4 divisors (see below), whose sum is σ = 181680. Its totient is φ = 151380.

The previous prime is 166487. The next prime is 166541. The reversal of 166529 is 925661.

166529 = 118² + 119² + ... + 128².

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 166529 - 2⁸ = 166273 is a prime.

It is a Duffinian number.

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

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7559 + ... + 7580.

It is an arithmetic number, because the mean of its divisors is an integer number (45420).

2¹⁶⁶⁵²⁹ is an apocalyptic number.

It is an amenable number.

166529 is a deficient number, since it is larger than the sum of its proper divisors (15151).

166529 is a wasteful number, since it uses less digits than its factorization.

166529 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15150.

The product of its digits is 3240, while the sum is 29.

The square root of 166529 is about 408.0796490883. The cubic root of 166529 is about 55.0169644638.

It can be divided in two parts, 16652 and 9, that added together give a palindrome (16661).

The spelling of 166529 in words is "one hundred sixty-six thousand, five hundred twenty-nine".