66532120068 has 48 divisors (see below), whose sum is σ = 158105122560. Its totient is φ = 21769407264.

The previous prime is 66532120063. The next prime is 66532120093. The reversal of 66532120068 is 86002123566.

It is not an unprimeable number, because it can be changed into a prime (66532120063) 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, 414771 + ... + 552357.

It is an arithmetic number, because the mean of its divisors is an integer number (3293856720).

Almost surely, 2^66532120068 is an apocalyptic number.

It is an amenable number.

66532120068 is an abundant number, since it is smaller than the sum of its proper divisors (91573002492).

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

66532120068 is a wasteful number, since it uses less digits than its factorization.

66532120068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138336 (or 138334 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 39.

The spelling of 66532120068 in words is "sixty-six billion, five hundred thirty-two million, one hundred twenty thousand, sixty-eight".