166366 has 8 divisors (see below), whose sum is σ = 251424. Its totient is φ = 82560.

The previous prime is 166363. The next prime is 166393. The reversal of 166366 is 663661.

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

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166363) 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, 171 + ... + 601.

It is an arithmetic number, because the mean of its divisors is an integer number (31428).

2¹⁶⁶³⁶⁶ is an apocalyptic number.

166366 is a deficient number, since it is larger than the sum of its proper divisors (85058).

166366 is a wasteful number, since it uses less digits than its factorization.

166366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 626.

The product of its digits is 3888, while the sum is 28.

The square root of 166366 is about 407.8798842797. The cubic root of 166366 is about 54.9990082466. Note that the first 3 decimals are identical.

The spelling of 166366 in words is "one hundred sixty-six thousand, three hundred sixty-six".