2660717521320 has 256 divisors, whose sum is σ = 8632429113600. Its totient is φ = 653781196800.

The previous prime is 2660717521313. The next prime is 2660717521321. The reversal of 2660717521320 is 231257170662.

It is not an unprimeable number, because it can be changed into a prime (2660717521321) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 458662420 + ... + 458668220.

It is an arithmetic number, because the mean of its divisors is an integer number (33720426225).

Almost surely, 2^{2660717521320} is an apocalyptic number.

2660717521320 is a gapful number since it is divisible by the number (20) 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 2660717521320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4316214556800).

2660717521320 is an abundant number, since it is smaller than the sum of its proper divisors (5971711592280).

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

2660717521320 is a wasteful number, since it uses less digits than its factorization.

2660717521320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11308 (or 11304 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 42.

The spelling of 2660717521320 in words is "two trillion, six hundred sixty billion, seven hundred seventeen million, five hundred twenty-one thousand, three hundred twenty".