660660840220 has 48 divisors (see below), whose sum is σ = 1399763312640. Its totient is φ = 261911409984.

The previous prime is 660660840199. The next prime is 660660840221. The reversal of 660660840220 is 22048066066.

660660840220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660660840221) 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, 2321691 + ... + 2590669.

It is an arithmetic number, because the mean of its divisors is an integer number (29161735680).

Almost surely, 2^660660840220 is an apocalyptic number.

It is an amenable number.

660660840220 is an abundant number, since it is smaller than the sum of its proper divisors (739102472420).

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

660660840220 is a wasteful number, since it uses less digits than its factorization.

660660840220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270082 (or 270080 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 40.

The spelling of 660660840220 in words is "six hundred sixty billion, six hundred sixty million, eight hundred forty thousand, two hundred twenty".