66811373036 has 12 divisors (see below), whose sum is σ = 116934406512. Its totient is φ = 33401542608.

The previous prime is 66811373033. The next prime is 66811373047. The reversal of 66811373036 is 63037311866.

It is not an unprimeable number, because it can be changed into a prime (66811373033) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 999560 + ... + 1064303.

It is an arithmetic number, because the mean of its divisors is an integer number (9744533876).

Almost surely, 2^66811373036 is an apocalyptic number.

It is an amenable number.

66811373036 is a deficient number, since it is larger than the sum of its proper divisors (50123033476).

66811373036 is a wasteful number, since it uses less digits than its factorization.

66811373036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2071960 (or 2071958 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 44.

The spelling of 66811373036 in words is "sixty-six billion, eight hundred eleven million, three hundred seventy-three thousand, thirty-six".