660544487984580 has 192 divisors, whose sum is σ = 2021646362738688. Its totient is φ = 160423581726720.

The previous prime is 660544487984567. The next prime is 660544487984603. The reversal of 660544487984580 is 85489784445066.

It is a junction number, because it is equal to n+sod(n) for n = 660544487984496 and 660544487984505.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 416054149 + ... + 417638771.

It is an arithmetic number, because the mean of its divisors is an integer number (10529408139264).

Almost surely, 2^{660544487984580} is an apocalyptic number.

660544487984580 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 660544487984580, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1010823181369344).

660544487984580 is an abundant number, since it is smaller than the sum of its proper divisors (1361101874754108).

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

660544487984580 is a wasteful number, since it uses less digits than its factorization.

660544487984580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1597866 (or 1597864 counting only the distinct ones).

The product of its (nonzero) digits is 7431782400, while the sum is 78.

The spelling of 660544487984580 in words is "six hundred sixty trillion, five hundred forty-four billion, four hundred eighty-seven million, nine hundred eighty-four thousand, five hundred eighty".