655478066880 has 1792 divisors, whose sum is σ = 2946211430400. Its totient is φ = 133533204480.

The previous prime is 655478066849. The next prime is 655478066909. The reversal of 655478066880 is 88660874556.

655478066880 is a `hidden beast` number, since 6 + 5 + 547 + 8 + 0 + 6 + 6 + 8 + 80 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

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 255 ways as a sum of consecutive naturals, for example, 3788890474 + ... + 3788890646.

It is an arithmetic number, because the mean of its divisors is an integer number (1644091200).

Almost surely, 2^655478066880 is an apocalyptic number.

655478066880 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 655478066880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1473105715200).

655478066880 is an abundant number, since it is smaller than the sum of its proper divisors (2290733363520).

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

655478066880 is a wasteful number, since it uses less digits than its factorization.

655478066880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359 (or 343 counting only the distinct ones).

The product of its (nonzero) digits is 77414400, while the sum is 63.

The spelling of 655478066880 in words is "six hundred fifty-five billion, four hundred seventy-eight million, sixty-six thousand, eight hundred eighty".