660328577500 has 120 divisors (see below), whose sum is σ = 1550489659488. Its totient is φ = 245091840000.

The previous prime is 660328577399. The next prime is 660328577509. The reversal of 660328577500 is 5775823066.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660328577509) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2908084 + ... + 3126916.

Almost surely, 2^660328577500 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 660328577500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (775244829744).

660328577500 is an abundant number, since it is smaller than the sum of its proper divisors (890161081988).

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

660328577500 is a wasteful number, since it uses less digits than its factorization.

660328577500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218945 (or 218928 counting only the distinct ones).

The product of its (nonzero) digits is 2116800, while the sum is 49.

The spelling of 660328577500 in words is "six hundred sixty billion, three hundred twenty-eight million, five hundred seventy-seven thousand, five hundred".