66916706240 has 28 divisors (see below), whose sum is σ = 159345407496. Its totient is φ = 26766682368.

The previous prime is 66916706201. The next prime is 66916706243. The reversal of 66916706240 is 4260761966.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66916706243) 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, 104557034 + ... + 104557673.

Almost surely, 2^66916706240 is an apocalyptic number.

It is an amenable number.

66916706240 is an abundant number, since it is smaller than the sum of its proper divisors (92428701256).

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

66916706240 is a wasteful number, since it uses less digits than its factorization.

66916706240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209114724 (or 209114714 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 47.

The spelling of 66916706240 in words is "sixty-six billion, nine hundred sixteen million, seven hundred six thousand, two hundred forty".