166437 has 6 divisors (see below), whose sum is σ = 240422. Its totient is φ = 110952.

The previous prime is 166429. The next prime is 166457. The reversal of 166437 is 734661.

166437 is a `hidden beast` number, since 16 + 643 + 7 = 666.

It can be written as a sum of positive squares in only one way, i.e., 136161 + 30276 = 369^2 + 174^2 .

It is not a de Polignac number, because 166437 - 2³ = 166429 is a prime.

It is a Duffinian number.

166437 is a lucky number.

It is a plaindrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 166437.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166417) 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 5 ways as a sum of consecutive naturals, for example, 9238 + ... + 9255.

2¹⁶⁶⁴³⁷ is an apocalyptic number.

It is an amenable number.

166437 is a deficient number, since it is larger than the sum of its proper divisors (73985).

166437 is a wasteful number, since it uses less digits than its factorization.

166437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18499 (or 18496 counting only the distinct ones).

The product of its digits is 3024, while the sum is 27.

The square root of 166437 is about 407.9669104229. The cubic root of 166437 is about 55.0068311075.

Adding to 166437 its sum of digits (27), we get a square (166464 = 408²).

The spelling of 166437 in words is "one hundred sixty-six thousand, four hundred thirty-seven".