166632289 has 4 divisors (see below), whose sum is σ = 172378260. Its totient is φ = 160886320.

The previous prime is 166632287. The next prime is 166632293. The reversal of 166632289 is 982236661.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 28804689 + 137827600 = 5367^2 + 11740^2 .

It is a cyclic number.

It is not a de Polignac number, because 166632289 - 2¹ = 166632287 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166632287) 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, 2872942 + ... + 2872999.

It is an arithmetic number, because the mean of its divisors is an integer number (43094565).

Almost surely, 2^166632289 is an apocalyptic number.

It is an amenable number.

166632289 is a deficient number, since it is larger than the sum of its proper divisors (5745971).

166632289 is an equidigital number, since it uses as much as digits as its factorization.

166632289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5745970.

The product of its digits is 186624, while the sum is 43.

The square root of 166632289 is about 12908.6129773884. The cubic root of 166632289 is about 550.2833680292.

The spelling of 166632289 in words is "one hundred sixty-six million, six hundred thirty-two thousand, two hundred eighty-nine".