66143144 has 16 divisors (see below), whose sum is σ = 124650900. Its totient is φ = 32902912.

The previous prime is 66143117. The next prime is 66143177. The reversal of 66143144 is 44134166.

66143144 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 61434244 + 4708900 = 7838^2 + 2170^2 .

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 19409 + ... + 22560.

Almost surely, 2^66143144 is an apocalyptic number.

It is an amenable number.

66143144 is a deficient number, since it is larger than the sum of its proper divisors (58507756).

66143144 is a wasteful number, since it uses less digits than its factorization.

66143144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42172 (or 42168 counting only the distinct ones).

The product of its digits is 6912, while the sum is 29.

The square root of 66143144 is about 8132.8435371646. The cubic root of 66143144 is about 404.4159523417.

The spelling of 66143144 in words is "sixty-six million, one hundred forty-three thousand, one hundred forty-four".