166663744 has 84 divisors (see below), whose sum is σ = 377433840. Its totient is φ = 72783360.

The previous prime is 166663741. The next prime is 166663769. The reversal of 166663744 is 447366661.

It is a self number, because there is not a number n which added to its sum of digits gives 166663744.

It is not an unprimeable number, because it can be changed into a prime (166663741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 205099 + ... + 205909.

It is an arithmetic number, because the mean of its divisors is an integer number (4493260).

Almost surely, 2^166663744 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 166663744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (188716920).

166663744 is an abundant number, since it is smaller than the sum of its proper divisors (210770096).

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

166663744 is a wasteful number, since it uses less digits than its factorization.

166663744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 868 (or 845 counting only the distinct ones).

The product of its digits is 435456, while the sum is 43.

The square root of 166663744 is about 12909.8312924685. The cubic root of 166663744 is about 550.3179913194.

It can be divided in two parts, 1666637 and 44, that added together give a square (1666681 = 1291²).

The spelling of 166663744 in words is "one hundred sixty-six million, six hundred sixty-three thousand, seven hundred forty-four".