660275727552 has 504 divisors, whose sum is σ = 2292288420240. Its totient is φ = 187890554880.

The previous prime is 660275727497. The next prime is 660275727557. The reversal of 660275727552 is 255727572066.

660275727552 is a `hidden beast` number, since 6 + 60 + 2 + 7 + 5 + 7 + 27 + 552 = 666.

It is a tau number, because it is divible by the number of its divisors (504).

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

It is not an unprimeable number, because it can be changed into a prime (660275727557) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 204989302 + ... + 204992522.

It is an arithmetic number, because the mean of its divisors is an integer number (4548191310).

Almost surely, 2^660275727552 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 660275727552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1146144210120).

660275727552 is an abundant number, since it is smaller than the sum of its proper divisors (1632012692688).

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

660275727552 is a wasteful number, since it uses less digits than its factorization.

660275727552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3531 (or 3502 counting only the distinct ones).

The product of its (nonzero) digits is 12348000, while the sum is 54.

The spelling of 660275727552 in words is "six hundred sixty billion, two hundred seventy-five million, seven hundred twenty-seven thousand, five hundred fifty-two".