166944549 has 4 divisors (see below), whose sum is σ = 222592736. Its totient is φ = 111296364.

The previous prime is 166944523. The next prime is 166944553. The reversal of 166944549 is 945449661.

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.

It is not a de Polignac number, because 166944549 - 2⁸ = 166944293 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 166944498 and 166944507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166944559) 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, 27824089 + ... + 27824094.

It is an arithmetic number, because the mean of its divisors is an integer number (55648184).

Almost surely, 2^166944549 is an apocalyptic number.

It is an amenable number.

166944549 is a deficient number, since it is larger than the sum of its proper divisors (55648187).

166944549 is an equidigital number, since it uses as much as digits as its factorization.

166944549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55648186.

The product of its digits is 933120, while the sum is 48.

The square root of 166944549 is about 12920.7023415912. The cubic root of 166944549 is about 550.6268874091.

The spelling of 166944549 in words is "one hundred sixty-six million, nine hundred forty-four thousand, five hundred forty-nine".