166069 has 4 divisors (see below), whose sum is σ = 168480. Its totient is φ = 163660.

The previous prime is 166063. The next prime is 166081. The reversal of 166069 is 960661.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 960661 = 13 ⋅73897.

It is a cyclic number.

It is not a de Polignac number, because 166069 - 2⁷ = 165941 is a prime.

It is a super-2 number, since 2×166069² = 55157825522, which contains 22 as substring.

It is a Duffinian number.

166069 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166063) 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, 1099 + ... + 1240.

It is an arithmetic number, because the mean of its divisors is an integer number (42120).

2¹⁶⁶⁰⁶⁹ is an apocalyptic number.

It is an amenable number.

166069 is a deficient number, since it is larger than the sum of its proper divisors (2411).

166069 is an equidigital number, since it uses as much as digits as its factorization.

166069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2410.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 166069 is about 407.5156438715. The cubic root of 166069 is about 54.9662602984.

The spelling of 166069 in words is "one hundred sixty-six thousand, sixty-nine".