166604 has 6 divisors (see below), whose sum is σ = 291564. Its totient is φ = 83300.

The previous prime is 166603. The next prime is 166609. The reversal of 166604 is 406661.

It is a plaindrome in base 15 and base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 166604.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 166604.

It is not an unprimeable number, because it can be changed into a prime (166601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20822 + ... + 20829.

It is an arithmetic number, because the mean of its divisors is an integer number (48594).

2¹⁶⁶⁶⁰⁴ is an apocalyptic number.

It is an amenable number.

166604 is a deficient number, since it is larger than the sum of its proper divisors (124960).

166604 is a wasteful number, since it uses less digits than its factorization.

166604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41655 (or 41653 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 166604 is about 408.1715325693. The cubic root of 166604 is about 55.0252225911.

The spelling of 166604 in words is "one hundred sixty-six thousand, six hundred four".