66366064726752 has 96 divisors (see below), whose sum is σ = 199176491953152. Its totient is φ = 18954275848704.

The previous prime is 66366064726751. The next prime is 66366064726757. The reversal of 66366064726752 is 25762746066366.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66366064726751) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17708923 + ... + 21126714.

It is an arithmetic number, because the mean of its divisors is an integer number (2074755124512).

Almost surely, 2^{66366064726752} is an apocalyptic number.

It is an amenable number.

66366064726752 is an abundant number, since it is smaller than the sum of its proper divisors (132810427226400).

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

66366064726752 is a wasteful number, since it uses less digits than its factorization.

66366064726752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38838200 (or 38838192 counting only the distinct ones).

The product of its (nonzero) digits is 548674560, while the sum is 66.

The spelling of 66366064726752 in words is "sixty-six trillion, three hundred sixty-six billion, sixty-four million, seven hundred twenty-six thousand, seven hundred fifty-two".