66869487360 has 648 divisors, whose sum is σ = 259375137840. Its totient is φ = 16306348032.

The previous prime is 66869487343. The next prime is 66869487371. The reversal of 66869487360 is 6378496866.

66869487360 is a `hidden beast` number, since 6 + 68 + 69 + 487 + 36 + 0 = 666.

66869487360 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 624948427 + ... + 624948533.

Almost surely, 2^66869487360 is an apocalyptic number.

66869487360 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 66869487360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (129687568920).

66869487360 is an abundant number, since it is smaller than the sum of its proper divisors (192505650480).

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

66869487360 is a wasteful number, since it uses less digits than its factorization.

66869487360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270 (or 130 counting only the distinct ones).

The product of its (nonzero) digits is 62705664, while the sum is 63.

The spelling of 66869487360 in words is "sixty-six billion, eight hundred sixty-nine million, four hundred eighty-seven thousand, three hundred sixty".