66183223842 has 18 divisors (see below), whose sum is σ = 143399349873. Its totient is φ = 22060710792.

The previous prime is 66183223817. The next prime is 66183223871. The reversal of 66183223842 is 24832238166.

66183223842 is a `hidden beast` number, since 6 + 618 + 3 + 2 + 23 + 8 + 4 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 38975051241 + 27208172601 = 197421^2 + 164949^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=181911.

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 8 ways as a sum of consecutive naturals, for example, 1061148 + ... + 1121784.

Almost surely, 2^66183223842 is an apocalyptic number.

66183223842 is an abundant number, since it is smaller than the sum of its proper divisors (77216126031).

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

66183223842 is an frugal number, since it uses more digits than its factorization.

66183223842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121282 (or 60642 counting only the distinct ones).

The product of its digits is 663552, while the sum is 45.

The spelling of 66183223842 in words is "sixty-six billion, one hundred eighty-three million, two hundred twenty-three thousand, eight hundred forty-two".