660505054878 has 48 divisors (see below), whose sum is σ = 1458241608096. Its totient is φ = 215992670400.

The previous prime is 660505054877. The next prime is 660505054883. The reversal of 660505054878 is 878450505066.

660505054878 is a `hidden beast` number, since 6 + 6 + 0 + 50 + 505 + 4 + 87 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660505054873) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11569303 + ... + 11626253.

It is an arithmetic number, because the mean of its divisors is an integer number (30380033502).

Almost surely, 2^660505054878 is an apocalyptic number.

660505054878 is an abundant number, since it is smaller than the sum of its proper divisors (797736553218).

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

660505054878 is a wasteful number, since it uses less digits than its factorization.

660505054878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69169 (or 69166 counting only the distinct ones).

The product of its (nonzero) digits is 8064000, while the sum is 54.

The spelling of 660505054878 in words is "six hundred sixty billion, five hundred five million, fifty-four thousand, eight hundred seventy-eight".