2660383871640 has 384 divisors, whose sum is σ = 10123937928000. Its totient is φ = 598687580160.

The previous prime is 2660383871633. The next prime is 2660383871641. The reversal of 2660383871640 is 461783830662.

2660383871640 is a `hidden beast` number, since 26 + 6 + 0 + 383 + 87 + 164 + 0 = 666.

2660383871640 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 not an unprimeable number, because it can be changed into a prime (2660383871641) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 4643686 + ... + 5185034.

Almost surely, 2^{2660383871640} is an apocalyptic number.

2660383871640 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 2660383871640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5061968964000).

2660383871640 is an abundant number, since it is smaller than the sum of its proper divisors (7463554056360).

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

2660383871640 is a wasteful number, since it uses less digits than its factorization.

2660383871640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 541467 (or 541460 counting only the distinct ones).

The product of its (nonzero) digits is 6967296, while the sum is 54.

The spelling of 2660383871640 in words is "two trillion, six hundred sixty billion, three hundred eighty-three million, eight hundred seventy-one thousand, six hundred forty".