2660821368 has 64 divisors (see below), whose sum is σ = 7050240000. Its totient is φ = 833951232.

The previous prime is 2660821349. The next prime is 2660821379. The reversal of 2660821368 is 8631280662.

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 15 ways as a sum of consecutive naturals, for example, 519283 + ... + 524381.

It is an arithmetic number, because the mean of its divisors is an integer number (110160000).

Almost surely, 2^2660821368 is an apocalyptic number.

It is an amenable number.

2660821368 is an abundant number, since it is smaller than the sum of its proper divisors (4389418632).

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

2660821368 is a wasteful number, since it uses less digits than its factorization.

2660821368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6404 (or 6400 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 42.

The square root of 2660821368 is about 51583.1500395236. The cubic root of 2660821368 is about 1385.7085815393.

The spelling of 2660821368 in words is "two billion, six hundred sixty million, eight hundred twenty-one thousand, three hundred sixty-eight".