660672754560 has 2592 divisors, whose sum is σ = 3141135012600. Its totient is φ = 132058128384.

The previous prime is 660672754549. The next prime is 660672754591. The reversal of 660672754560 is 65457276066.

660672754560 is a `hidden beast` number, since 6 + 6 + 0 + 6 + 7 + 2 + 75 + 4 + 560 = 666.

It is a tau number, because it is divible by the number of its divisors (2592).

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

It is a junction number, because it is equal to n+sod(n) for n = 660672754497 and 660672754506.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 323 ways as a sum of consecutive naturals, for example, 34772250231 + ... + 34772250249.

Almost surely, 2^660672754560 is an apocalyptic number.

660672754560 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 660672754560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1570567506300).

660672754560 is an abundant number, since it is smaller than the sum of its proper divisors (2480462258040).

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

660672754560 is an equidigital number, since it uses as much as digits as its factorization.

660672754560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102 (or 49 counting only the distinct ones).

The product of its (nonzero) digits is 12700800, while the sum is 54.

The spelling of 660672754560 in words is "six hundred sixty billion, six hundred seventy-two million, seven hundred fifty-four thousand, five hundred sixty".