66671144 has 24 divisors (see below), whose sum is σ = 132798990. Its totient is φ = 31373568.

The previous prime is 66671131. The next prime is 66671167. The reversal of 66671144 is 44117666.

66671144 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 3 ways, for example, as 66618244 + 52900 = 8162^2 + 230^2 .

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 5 ways as a sum of consecutive naturals, for example, 12107 + ... + 16730.

Almost surely, 2^66671144 is an apocalyptic number.

It is an amenable number.

66671144 is a deficient number, since it is larger than the sum of its proper divisors (66127846).

66671144 is a wasteful number, since it uses less digits than its factorization.

66671144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28877 (or 28856 counting only the distinct ones).

The product of its digits is 24192, while the sum is 35.

The square root of 66671144 is about 8165.2399842258. The cubic root of 66671144 is about 405.4892101836.

The spelling of 66671144 in words is "sixty-six million, six hundred seventy-one thousand, one hundred forty-four".