66136749228 has 72 divisors (see below), whose sum is σ = 190306561536. Its totient is φ = 19170069600.

The previous prime is 66136749191. The next prime is 66136749253. The reversal of 66136749228 is 82294763166.

66136749228 is a `hidden beast` number, since 66 + 13 + 67 + 492 + 28 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3621588 + ... + 3639803.

It is an arithmetic number, because the mean of its divisors is an integer number (2643146688).

Almost surely, 2^66136749228 is an apocalyptic number.

It is an amenable number.

66136749228 is an abundant number, since it is smaller than the sum of its proper divisors (124169812308).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66136749228 is a wasteful number, since it uses less digits than its factorization.

66136749228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7261435 (or 7261430 counting only the distinct ones).

The product of its digits is 5225472, while the sum is 54.

The spelling of 66136749228 in words is "sixty-six billion, one hundred thirty-six million, seven hundred forty-nine thousand, two hundred twenty-eight".