66733406736 has 20 divisors (see below), whose sum is σ = 172394634192. Its totient is φ = 22244468896.

The previous prime is 66733406717. The next prime is 66733406801. The reversal of 66733406736 is 63760433766.

It is an unprimeable number.

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, 695139606 + ... + 695139701.

Almost surely, 2^66733406736 is an apocalyptic number.

It is an amenable number.

66733406736 is an abundant number, since it is smaller than the sum of its proper divisors (105661227456).

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

66733406736 is a wasteful number, since it uses less digits than its factorization.

66733406736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1390279318 (or 1390279312 counting only the distinct ones).

The product of its (nonzero) digits is 6858432, while the sum is 51.

The spelling of 66733406736 in words is "sixty-six billion, seven hundred thirty-three million, four hundred six thousand, seven hundred thirty-six".