66742766140 has 12 divisors (see below), whose sum is σ = 140159808936. Its totient is φ = 26697106448.

The previous prime is 66742766137. The next prime is 66742766141. The reversal of 66742766140 is 4166724766.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66742766141) 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, 1668569134 + ... + 1668569173.

It is an arithmetic number, because the mean of its divisors is an integer number (11679984078).

Almost surely, 2^66742766140 is an apocalyptic number.

It is an amenable number.

66742766140 is an abundant number, since it is smaller than the sum of its proper divisors (73417042796).

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

66742766140 is a wasteful number, since it uses less digits than its factorization.

66742766140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3337138316 (or 3337138314 counting only the distinct ones).

The product of its (nonzero) digits is 2032128, while the sum is 49.

The spelling of 66742766140 in words is "sixty-six billion, seven hundred forty-two million, seven hundred sixty-six thousand, one hundred forty".