66611144 has 16 divisors (see below), whose sum is σ = 129203100. Its totient is φ = 32156992.

The previous prime is 66611143. The next prime is 66611159. The reversal of 66611144 is 44111666.

It can be written as a sum of positive squares in 2 ways, for example, as 61936900 + 4674244 = 7870^2 + 2162^2 .

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a zygodrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (66611143) 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, 143327 + ... + 143790.

Almost surely, 2^66611144 is an apocalyptic number.

It is an amenable number.

66611144 is a deficient number, since it is larger than the sum of its proper divisors (62591956).

66611144 is a wasteful number, since it uses less digits than its factorization.

66611144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287152 (or 287148 counting only the distinct ones).

The product of its digits is 3456, while the sum is 29.

The square root of 66611144 is about 8161.5650459945. The cubic root of 66611144 is about 405.3675350824.

The spelling of 66611144 in words is "sixty-six million, six hundred eleven thousand, one hundred forty-four".