66135569138 has 32 divisors (see below), whose sum is σ = 102397321152. Its totient is φ = 32022705600.

The previous prime is 66135569069. The next prime is 66135569147. The reversal of 66135569138 is 83196553166.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 66135569138.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2955773 + ... + 2978063.

It is an arithmetic number, because the mean of its divisors is an integer number (3199916286).

Almost surely, 2^66135569138 is an apocalyptic number.

66135569138 is a deficient number, since it is larger than the sum of its proper divisors (36261752014).

66135569138 is a wasteful number, since it uses less digits than its factorization.

66135569138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22730.

The product of its digits is 3499200, while the sum is 53.

The spelling of 66135569138 in words is "sixty-six billion, one hundred thirty-five million, five hundred sixty-nine thousand, one hundred thirty-eight".