66804836318 has 32 divisors (see below), whose sum is σ = 117142018560. Its totient is φ = 28235263360.

The previous prime is 66804836309. The next prime is 66804836347. The reversal of 66804836318 is 81363840866.

It is a self number, because there is not a number n which added to its sum of digits gives 66804836318.

It is a congruent number.

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, 1044998 + ... + 1107081.

It is an arithmetic number, because the mean of its divisors is an integer number (3660688080).

Almost surely, 2^66804836318 is an apocalyptic number.

66804836318 is a deficient number, since it is larger than the sum of its proper divisors (50337182242).

66804836318 is a wasteful number, since it uses less digits than its factorization.

66804836318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2152192.

The product of its (nonzero) digits is 3981312, while the sum is 53.

The spelling of 66804836318 in words is "sixty-six billion, eight hundred four million, eight hundred thirty-six thousand, three hundred eighteen".