166544144 has 20 divisors (see below), whose sum is σ = 347501196. Its totient is φ = 76866432.

The previous prime is 166544137. The next prime is 166544149. The reversal of 166544144 is 441445661.

It can be written as a sum of positive squares in 2 ways, for example, as 94090000 + 72454144 = 9700^2 + 8512^2 .

It is not an unprimeable number, because it can be changed into a prime (166544149) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 400139 + ... + 400554.

Almost surely, 2^166544144 is an apocalyptic number.

It is an amenable number.

166544144 is an abundant number, since it is smaller than the sum of its proper divisors (180957052).

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

166544144 is a wasteful number, since it uses less digits than its factorization.

166544144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 800714 (or 800708 counting only the distinct ones).

The product of its digits is 46080, while the sum is 35.

The square root of 166544144 is about 12905.1983324550. The cubic root of 166544144 is about 550.1863214465.

The spelling of 166544144 in words is "one hundred sixty-six million, five hundred forty-four thousand, one hundred forty-four".