66131368 has 16 divisors (see below), whose sum is σ = 128272500. Its totient is φ = 31925376.

The previous prime is 66131353. The next prime is 66131369. The reversal of 66131368 is 86313166.

It is a happy number.

66131368 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 59567524 + 6563844 = 7718^2 + 2562^2 .

It is not an unprimeable number, because it can be changed into a prime (66131369) 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 in 3 ways as a sum of consecutive naturals, for example, 142293 + ... + 142756.

Almost surely, 2^66131368 is an apocalyptic number.

It is an amenable number.

66131368 is a deficient number, since it is larger than the sum of its proper divisors (62141132).

66131368 is a wasteful number, since it uses less digits than its factorization.

66131368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285084 (or 285080 counting only the distinct ones).

The product of its digits is 15552, while the sum is 34.

The square root of 66131368 is about 8132.1195269130. The cubic root of 66131368 is about 404.3919504340.

The spelling of 66131368 in words is "sixty-six million, one hundred thirty-one thousand, three hundred sixty-eight".