166664544 has 48 divisors (see below), whose sum is σ = 441851760. Its totient is φ = 55001600.

The previous prime is 166664543. The next prime is 166664551. The reversal of 166664544 is 445466661.

166664544 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (48).

It is a junction number, because it is equal to n+sod(n) for n = 166664496 and 166664505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166664543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1102 + ... + 18290.

It is an arithmetic number, because the mean of its divisors is an integer number (9205245).

Almost surely, 2^166664544 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 166664544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (220925880).

166664544 is an abundant number, since it is smaller than the sum of its proper divisors (275187216).

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

166664544 is a wasteful number, since it uses less digits than its factorization.

166664544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17303 (or 17295 counting only the distinct ones).

The product of its digits is 414720, while the sum is 42.

The square root of 166664544 is about 12909.8622765698. The cubic root of 166664544 is about 550.3188718422.

The spelling of 166664544 in words is "one hundred sixty-six million, six hundred sixty-four thousand, five hundred forty-four".