166532361 has 4 divisors (see below), whose sum is σ = 222043152. Its totient is φ = 111021572.

The previous prime is 166532273. The next prime is 166532363. The reversal of 166532361 is 163235661.

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: 163235661 = 3 ⋅54411887.

It is a cyclic number.

It is not a de Polignac number, because 166532361 - 2¹⁴ = 166515977 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (166532363) 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 in 3 ways as a sum of consecutive naturals, for example, 27755391 + ... + 27755396.

It is an arithmetic number, because the mean of its divisors is an integer number (55510788).

Almost surely, 2^166532361 is an apocalyptic number.

It is an amenable number.

166532361 is a deficient number, since it is larger than the sum of its proper divisors (55510791).

166532361 is an equidigital number, since it uses as much as digits as its factorization.

166532361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55510790.

The product of its digits is 19440, while the sum is 33.

The square root of 166532361 is about 12904.7418029188. The cubic root of 166532361 is about 550.1733459110.

The spelling of 166532361 in words is "one hundred sixty-six million, five hundred thirty-two thousand, three hundred sixty-one".