66733666803 has 32 divisors (see below), whose sum is σ = 100158059520. Its totient is φ = 43910177760.

The previous prime is 66733666721. The next prime is 66733666819. The reversal of 66733666803 is 30866633766.

It is a happy number.

It is not a de Polignac number, because 66733666803 - 2²⁴ = 66716889587 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66733666803.

It is not an unprimeable number, because it can be changed into a prime (66733666843) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 740301 + ... + 825537.

It is an arithmetic number, because the mean of its divisors is an integer number (3129939360).

Almost surely, 2^66733666803 is an apocalyptic number.

66733666803 is a deficient number, since it is larger than the sum of its proper divisors (33424392717).

66733666803 is a wasteful number, since it uses less digits than its factorization.

66733666803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85624 (or 85618 counting only the distinct ones).

The product of its (nonzero) digits is 11757312, while the sum is 54.

The spelling of 66733666803 in words is "sixty-six billion, seven hundred thirty-three million, six hundred sixty-six thousand, eight hundred three".