64740666760 has 128 divisors (see below), whose sum is σ = 181699200000. Its totient is φ = 20169020160.

The previous prime is 64740666733. The next prime is 64740666779. The reversal of 64740666760 is 6766604746.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 64740666698 and 64740666707.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8629491 + ... + 8636989.

It is an arithmetic number, because the mean of its divisors is an integer number (1419525000).

Almost surely, 2^64740666760 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64740666760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90849600000).

64740666760 is an abundant number, since it is smaller than the sum of its proper divisors (116958533240).

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

64740666760 is a wasteful number, since it uses less digits than its factorization.

64740666760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10331 (or 10327 counting only the distinct ones).

The product of its (nonzero) digits is 6096384, while the sum is 52.

The spelling of 64740666760 in words is "sixty-four billion, seven hundred forty million, six hundred sixty-six thousand, seven hundred sixty".