166443444 has 24 divisors (see below), whose sum is σ = 431520320. Its totient is φ = 55481112.

The previous prime is 166443443. The next prime is 166443461. The reversal of 166443444 is 444344661.

166443444 is a `hidden beast` number, since 1 + 6 + 644 + 3 + 4 + 4 + 4 = 666.

It is a super-2 number, since 2×166443444² = 55406840101162272, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 166443399 and 166443408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166443443) 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 7 ways as a sum of consecutive naturals, for example, 770464 + ... + 770679.

Almost surely, 2^166443444 is an apocalyptic number.

It is an amenable number.

166443444 is an abundant number, since it is smaller than the sum of its proper divisors (265076876).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

166443444 is a wasteful number, since it uses less digits than its factorization.

166443444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1541156 (or 1541148 counting only the distinct ones).

The product of its digits is 110592, while the sum is 36.

The square root of 166443444 is about 12901.2962139469. The cubic root of 166443444 is about 550.0754100458.

The spelling of 166443444 in words is "one hundred sixty-six million, four hundred forty-three thousand, four hundred forty-four".