166424441 has 8 divisors (see below), whose sum is σ = 176368104. Its totient is φ = 156497920.

The previous prime is 166424437. The next prime is 166424459. The reversal of 166424441 is 144424661.

It can be written as a sum of positive squares in 4 ways, for example, as 1430416 + 164994025 = 1196^2 + 12845^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 166424441 - 2² = 166424437 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 166424398 and 166424407.

It is not an unprimeable number, because it can be changed into a prime (166424411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19541 + ... + 26733.

It is an arithmetic number, because the mean of its divisors is an integer number (22046013).

Almost surely, 2^166424441 is an apocalyptic number.

It is an amenable number.

166424441 is a deficient number, since it is larger than the sum of its proper divisors (9943663).

166424441 is a wasteful number, since it uses less digits than its factorization.

166424441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8571.

The product of its digits is 18432, while the sum is 32.

The square root of 166424441 is about 12900.5597165394. The cubic root of 166424441 is about 550.0544750451.

The spelling of 166424441 in words is "one hundred sixty-six million, four hundred twenty-four thousand, four hundred forty-one".