166397444 has 12 divisors (see below), whose sum is σ = 297967824. Its totient is φ = 81263784.

The previous prime is 166397423. The next prime is 166397449. The reversal of 166397444 is 444793661.

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 166397395 and 166397404.

It is not an unprimeable number, because it can be changed into a prime (166397449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 483542 + ... + 483885.

It is an arithmetic number, because the mean of its divisors is an integer number (24830652).

Almost surely, 2^166397444 is an apocalyptic number.

It is an amenable number.

166397444 is a deficient number, since it is larger than the sum of its proper divisors (131570380).

166397444 is a wasteful number, since it uses less digits than its factorization.

166397444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 967474 (or 967472 counting only the distinct ones).

The product of its digits is 435456, while the sum is 44.

The square root of 166397444 is about 12899.5133241530. The cubic root of 166397444 is about 550.0247305684.

The spelling of 166397444 in words is "one hundred sixty-six million, three hundred ninety-seven thousand, four hundred forty-four".