1660525707720 has 128 divisors (see below), whose sum is σ = 5720471424000. Its totient is φ = 381364750080.

The previous prime is 1660525707661. The next prime is 1660525707733. The reversal of 1660525707720 is 277075250661.

It is a self number, because there is not a number n which added to its sum of digits gives 1660525707720.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 33079500 + ... + 33129659.

It is an arithmetic number, because the mean of its divisors is an integer number (44691183000).

Almost surely, 2^{1660525707720} is an apocalyptic number.

1660525707720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1660525707720 is an abundant number, since it is smaller than the sum of its proper divisors (4059945716280).

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

1660525707720 is a wasteful number, since it uses less digits than its factorization.

1660525707720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66209203 (or 66209199 counting only the distinct ones).

The product of its (nonzero) digits is 1234800, while the sum is 48.

The spelling of 1660525707720 in words is "one trillion, six hundred sixty billion, five hundred twenty-five million, seven hundred seven thousand, seven hundred twenty".