64064688660 has 288 divisors, whose sum is σ = 229617303552. Its totient is φ = 14148622080.

The previous prime is 64064688659. The next prime is 64064688673. The reversal of 64064688660 is 6688646046.

64064688660 is a `hidden beast` number, since 6 + 40 + 6 + 468 + 86 + 60 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 64064688597 and 64064688606.

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 95 ways as a sum of consecutive naturals, for example, 43082437 + ... + 43083923.

It is an arithmetic number, because the mean of its divisors is an integer number (797282304).

Almost surely, 2^64064688660 is an apocalyptic number.

64064688660 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 64064688660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114808651776).

64064688660 is an abundant number, since it is smaller than the sum of its proper divisors (165552614892).

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

64064688660 is a wasteful number, since it uses less digits than its factorization.

64064688660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2643 (or 2638 counting only the distinct ones).

The product of its (nonzero) digits is 7962624, while the sum is 54.

The spelling of 64064688660 in words is "sixty-four billion, sixty-four million, six hundred eighty-eight thousand, six hundred sixty".