166516164 has 18 divisors (see below), whose sum is σ = 420915950. Its totient is φ = 55505376.

The previous prime is 166516157. The next prime is 166516183. The reversal of 166516164 is 461615661.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 107993664 + 58522500 = 10392^2 + 7650^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 4625449 = 166516164 / (1 + 6 + 6 + 5 + 1 + 6 + 1 + 6 + 4).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2312689 + ... + 2312760.

Almost surely, 2^166516164 is an apocalyptic number.

It is an amenable number.

166516164 is an abundant number, since it is smaller than the sum of its proper divisors (254399786).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

166516164 is a wasteful number, since it uses less digits than its factorization.

166516164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4625459 (or 4625454 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 166516164 is about 12904.1142276407. The cubic root of 166516164 is about 550.1555086440.

The spelling of 166516164 in words is "one hundred sixty-six million, five hundred sixteen thousand, one hundred sixty-four".