166427 has 4 divisors (see below), whose sum is σ = 170016. Its totient is φ = 162840.

The previous prime is 166417. The next prime is 166429. The reversal of 166427 is 724661.

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 166427 - 2⁶ = 166363 is a prime.

It is a Duffinian number.

It is a zygodrome in base 6.

It is a junction number, because it is equal to n+sod(n) for n = 166396 and 166405.

It is not an unprimeable number, because it can be changed into a prime (166429) 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, 1724 + ... + 1817.

It is an arithmetic number, because the mean of its divisors is an integer number (42504).

2¹⁶⁶⁴²⁷ is an apocalyptic number.

166427 is a deficient number, since it is larger than the sum of its proper divisors (3589).

166427 is an equidigital number, since it uses as much as digits as its factorization.

166427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3588.

The product of its digits is 2016, while the sum is 26.

The square root of 166427 is about 407.9546543429. The cubic root of 166427 is about 55.0057294307.

The spelling of 166427 in words is "one hundred sixty-six thousand, four hundred twenty-seven".