166417 has 2 divisors, whose sum is σ = 166418. Its totient is φ = 166416.

The previous prime is 166409. The next prime is 166429. The reversal of 166417 is 714661.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 96721 + 69696 = 311^2 + 264^2 .

It is a cyclic number.

It is not a de Polignac number, because 166417 - 2³ = 166409 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 166391 and 166400.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83208 + 83209.

It is an arithmetic number, because the mean of its divisors is an integer number (83209).

2¹⁶⁶⁴¹⁷ is an apocalyptic number.

It is an amenable number.

166417 is a deficient number, since it is larger than the sum of its proper divisors (1).

166417 is an equidigital number, since it uses as much as digits as its factorization.

166417 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 166417 is about 407.9423978946. The cubic root of 166417 is about 55.0046277098.

It can be divided in two parts, 1664 and 17, that added together give a square (1681 = 41²).

The spelling of 166417 in words is "one hundred sixty-six thousand, four hundred seventeen".