66144976 has 10 divisors (see below), whose sum is σ = 128155922. Its totient is φ = 33072480.

The previous prime is 66144973. The next prime is 66144983. The reversal of 66144976 is 67944166.

66144976 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 only one way, i.e., 41938576 + 24206400 = 6476^2 + 4920^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66144973) by changing a digit.

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 as a sum of consecutive naturals, namely, 2067015 + ... + 2067046.

Almost surely, 2^66144976 is an apocalyptic number.

It is an amenable number.

66144976 is a deficient number, since it is larger than the sum of its proper divisors (62010946).

66144976 is a wasteful number, since it uses less digits than its factorization.

66144976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4134069 (or 4134063 counting only the distinct ones).

The product of its digits is 217728, while the sum is 43.

The square root of 66144976 is about 8132.9561661182. The cubic root of 66144976 is about 404.4196860781.

The spelling of 66144976 in words is "sixty-six million, one hundred forty-four thousand, nine hundred seventy-six".