66305140660 has 24 divisors (see below), whose sum is σ = 151899050016. Its totient is φ = 24110960160.

The previous prime is 66305140651. The next prime is 66305140661. The reversal of 66305140660 is 6604150366.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66305140661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 150693282 + ... + 150693721.

It is an arithmetic number, because the mean of its divisors is an integer number (6329127084).

Almost surely, 2^66305140660 is an apocalyptic number.

It is an amenable number.

66305140660 is an abundant number, since it is smaller than the sum of its proper divisors (85593909356).

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

66305140660 is a wasteful number, since it uses less digits than its factorization.

66305140660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301387023 (or 301387021 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 37.

The spelling of 66305140660 in words is "sixty-six billion, three hundred five million, one hundred forty thousand, six hundred sixty".