166507 has 4 divisors (see below), whose sum is σ = 181656. Its totient is φ = 151360.

The previous prime is 166487. The next prime is 166541. The reversal of 166507 is 705661.

166507 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 705661 = 11 ⋅64151.

It is a de Polignac number, because none of the positive numbers 2^k-166507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166567) 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, 7558 + ... + 7579.

It is an arithmetic number, because the mean of its divisors is an integer number (45414).

2¹⁶⁶⁵⁰⁷ is an apocalyptic number.

166507 is a deficient number, since it is larger than the sum of its proper divisors (15149).

166507 is a wasteful number, since it uses less digits than its factorization.

166507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15148.

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 166507 is about 408.0526926758. The cubic root of 166507 is about 55.0145416095.

The spelling of 166507 in words is "one hundred sixty-six thousand, five hundred seven".