66733666804 has 48 divisors (see below), whose sum is σ = 141386878080. Its totient is φ = 26904729600.

The previous prime is 66733666721. The next prime is 66733666819. The reversal of 66733666804 is 40866633766.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 980479 + ... + 1046329.

It is an arithmetic number, because the mean of its divisors is an integer number (2945559960).

Almost surely, 2^66733666804 is an apocalyptic number.

It is an amenable number.

66733666804 is an abundant number, since it is smaller than the sum of its proper divisors (74653211276).

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

66733666804 is a wasteful number, since it uses less digits than its factorization.

66733666804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68008 (or 68006 counting only the distinct ones).

The product of its (nonzero) digits is 15676416, while the sum is 55.

The spelling of 66733666804 in words is "sixty-six billion, seven hundred thirty-three million, six hundred sixty-six thousand, eight hundred four".