166535 has 8 divisors (see below), whose sum is σ = 210480. Its totient is φ = 126144.

The previous prime is 166487. The next prime is 166541. The reversal of 166535 is 535661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 166535 - 2⁶ = 166471 is a prime.

It is a zygodrome in base 6.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 782 + ... + 971.

It is an arithmetic number, because the mean of its divisors is an integer number (26310).

2¹⁶⁶⁵³⁵ is an apocalyptic number.

166535 is a deficient number, since it is larger than the sum of its proper divisors (43945).

166535 is a wasteful number, since it uses less digits than its factorization.

166535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1777.

The product of its digits is 2700, while the sum is 26.

The square root of 166535 is about 408.0870005281. The cubic root of 166535 is about 55.0176252052.

The spelling of 166535 in words is "one hundred sixty-six thousand, five hundred thirty-five".