660575644980 has 96 divisors (see below), whose sum is σ = 1860999452928. Its totient is φ = 175071897600.

The previous prime is 660575644969. The next prime is 660575644987. The reversal of 660575644980 is 89446575066.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660575644987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7227970 + ... + 7318790.

It is an arithmetic number, because the mean of its divisors is an integer number (19385410968).

Almost surely, 2^660575644980 is an apocalyptic number.

660575644980 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

660575644980 is an abundant number, since it is smaller than the sum of its proper divisors (1200423807948).

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

660575644980 is a wasteful number, since it uses less digits than its factorization.

660575644980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91577 (or 91575 counting only the distinct ones).

The product of its (nonzero) digits is 43545600, while the sum is 60.

The spelling of 660575644980 in words is "six hundred sixty billion, five hundred seventy-five million, six hundred forty-four thousand, nine hundred eighty".