166494584 has 8 divisors (see below), whose sum is σ = 312177360. Its totient is φ = 83247288.

The previous prime is 166494569. The next prime is 166494589. The reversal of 166494584 is 485494661.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166494589) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10405904 + ... + 10405919.

It is an arithmetic number, because the mean of its divisors is an integer number (39022170).

Almost surely, 2^166494584 is an apocalyptic number.

It is an amenable number.

166494584 is a deficient number, since it is larger than the sum of its proper divisors (145682776).

166494584 is a wasteful number, since it uses less digits than its factorization.

166494584 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20811829 (or 20811825 counting only the distinct ones).

The product of its digits is 829440, while the sum is 47.

The square root of 166494584 is about 12903.2780331201. The cubic root of 166494584 is about 550.1317414442.

The spelling of 166494584 in words is "one hundred sixty-six million, four hundred ninety-four thousand, five hundred eighty-four".