166471 has 2 divisors, whose sum is σ = 166472. Its totient is φ = 166470.

The previous prime is 166457. The next prime is 166487. The reversal of 166471 is 174661.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166471 is a prime.

It is a super-3 number, since 3×166471³ = 13840029627915333, which contains 333 as substring.

166471 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83235 + 83236.

It is an arithmetic number, because the mean of its divisors is an integer number (83236).

2¹⁶⁶⁴⁷¹ is an apocalyptic number.

166471 is a deficient number, since it is larger than the sum of its proper divisors (1).

166471 is an equidigital number, since it uses as much as digits as its factorization.

166471 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1008, while the sum is 25.

The square root of 166471 is about 408.0085783412. The cubic root of 166471 is about 55.0105764784.

The spelling of 166471 in words is "one hundred sixty-six thousand, four hundred seventy-one".