166550441 has 4 divisors (see below), whose sum is σ = 166604112. Its totient is φ = 166496772.

The previous prime is 166550437. The next prime is 166550453. The reversal of 166550441 is 144055661.

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: 144055661 = 151 ⋅954011.

It is a cyclic number.

It is not a de Polignac number, because 166550441 - 2² = 166550437 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 166550398 and 166550407.

It is not an unprimeable number, because it can be changed into a prime (166550491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21875 + ... + 28488.

It is an arithmetic number, because the mean of its divisors is an integer number (41651028).

Almost surely, 2^166550441 is an apocalyptic number.

It is an amenable number.

166550441 is a deficient number, since it is larger than the sum of its proper divisors (53671).

166550441 is an equidigital number, since it uses as much as digits as its factorization.

166550441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53670.

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 166550441 is about 12905.4423016028. The cubic root of 166550441 is about 550.1932555031.

The spelling of 166550441 in words is "one hundred sixty-six million, five hundred fifty thousand, four hundred forty-one".