660120707544 has 64 divisors (see below), whose sum is σ = 1724576313600. Its totient is φ = 210164989056.

The previous prime is 660120707537. The next prime is 660120707557. The reversal of 660120707544 is 445707021066.

It is a junction number, because it is equal to n+sod(n) for n = 660120707496 and 660120707505.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 498439 + ... + 1252470.

It is an arithmetic number, because the mean of its divisors is an integer number (26946504900).

Almost surely, 2^660120707544 is an apocalyptic number.

It is an amenable number.

660120707544 is an abundant number, since it is smaller than the sum of its proper divisors (1064455606056).

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

660120707544 is a wasteful number, since it uses less digits than its factorization.

660120707544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1751624 (or 1751620 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 42.

The spelling of 660120707544 in words is "six hundred sixty billion, one hundred twenty million, seven hundred seven thousand, five hundred forty-four".