66575144 has 16 divisors (see below), whose sum is σ = 127873620. Its totient is φ = 32475520.

The previous prime is 66575143. The next prime is 66575147. The reversal of 66575144 is 44157566.

It can be written as a sum of positive squares in 2 ways, for example, as 66227044 + 348100 = 8138^2 + 590^2 .

It is a junction number, because it is equal to n+sod(n) for n = 66575098 and 66575107.

It is not an unprimeable number, because it can be changed into a prime (66575143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101159 + ... + 101814.

Almost surely, 2^66575144 is an apocalyptic number.

It is an amenable number.

66575144 is a deficient number, since it is larger than the sum of its proper divisors (61298476).

66575144 is a wasteful number, since it uses less digits than its factorization.

66575144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203020 (or 203016 counting only the distinct ones).

The product of its digits is 100800, while the sum is 38.

The square root of 66575144 is about 8159.3592885716. The cubic root of 66575144 is about 405.2944949465.

The spelling of 66575144 in words is "sixty-six million, five hundred seventy-five thousand, one hundred forty-four".