660253745491200 has 864 divisors, whose sum is σ = 2772636371025920. Its totient is φ = 150605120102400.

The previous prime is 660253745491129. The next prime is 660253745491213. The reversal of 660253745491200 is 2194547352066.

It is a happy number.

660253745491200 is a `hidden beast` number, since 6 + 6 + 0 + 2 + 5 + 3 + 74 + 549 + 1 + 20 + 0 = 666.

660253745491200 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (864).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 588514785 + ... + 589635615.

Almost surely, 2^{660253745491200} is an apocalyptic number.

660253745491200 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 660253745491200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1386318185512960).

660253745491200 is an abundant number, since it is smaller than the sum of its proper divisors (2112382625534720).

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

660253745491200 is a wasteful number, since it uses less digits than its factorization.

660253745491200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1121360 (or 1121335 counting only the distinct ones).

The product of its (nonzero) digits is 10886400, while the sum is 54.

The spelling of 660253745491200 in words is "six hundred sixty trillion, two hundred fifty-three billion, seven hundred forty-five million, four hundred ninety-one thousand, two hundred".