166435 has 4 divisors (see below), whose sum is σ = 199728. Its totient is φ = 133144.

The previous prime is 166429. The next prime is 166457. The reversal of 166435 is 534661.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 166435 - 2⁵ = 166403 is a prime.

It is a Duffinian number.

166435 is a lucky number.

It is a plaindrome in base 15.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 16639 + ... + 16648.

It is an arithmetic number, because the mean of its divisors is an integer number (49932).

2¹⁶⁶⁴³⁵ is an apocalyptic number.

166435 is a deficient number, since it is larger than the sum of its proper divisors (33293).

166435 is an equidigital number, since it uses as much as digits as its factorization.

166435 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33292.

The product of its digits is 2160, while the sum is 25.

The square root of 166435 is about 407.9644592363. The cubic root of 166435 is about 55.0066107756.

The spelling of 166435 in words is "one hundred sixty-six thousand, four hundred thirty-five".