66568318966 has 4 divisors (see below), whose sum is σ = 99852478452. Its totient is φ = 33284159482.

The previous prime is 66568318897. The next prime is 66568318991. The reversal of 66568318966 is 66981386566.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66981386566 = 2 ⋅33490693283.

It is a junction number, because it is equal to n+sod(n) for n = 66568318898 and 66568318907.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16642079740 + ... + 16642079743.

It is an arithmetic number, because the mean of its divisors is an integer number (24963119613).

Almost surely, 2^66568318966 is an apocalyptic number.

66568318966 is a deficient number, since it is larger than the sum of its proper divisors (33284159486).

66568318966 is a wasteful number, since it uses less digits than its factorization.

66568318966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33284159485.

The product of its digits is 67184640, while the sum is 64.

The spelling of 66568318966 in words is "sixty-six billion, five hundred sixty-eight million, three hundred eighteen thousand, nine hundred sixty-six".