660351856950720 has 1120 divisors, whose sum is σ = 2599356184641216. Its totient is φ = 157787755315200.

The previous prime is 660351856950713. The next prime is 660351856950739. The reversal of 660351856950720 is 27059658153066.

It is a happy number.

660351856950720 is a `hidden beast` number, since 6 + 6 + 0 + 3 + 5 + 18 + 569 + 50 + 7 + 2 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 34072115430 + ... + 34072134810.

Almost surely, 2^{660351856950720} is an apocalyptic number.

660351856950720 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 660351856950720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1299678092320608).

660351856950720 is an abundant number, since it is smaller than the sum of its proper divisors (1939004327690496).

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

660351856950720 is a wasteful number, since it uses less digits than its factorization.

660351856950720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21131 (or 21112 counting only the distinct ones).

The product of its (nonzero) digits is 81648000, while the sum is 63.

The spelling of 660351856950720 in words is "six hundred sixty trillion, three hundred fifty-one billion, eight hundred fifty-six million, nine hundred fifty thousand, seven hundred twenty".