6618855768 has 64 divisors (see below), whose sum is σ = 18917141760. Its totient is φ = 1890489216.

The previous prime is 6618855767. The next prime is 6618855773. The reversal of 6618855768 is 8675588166.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6618855767) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 876055 + ... + 883577.

It is an arithmetic number, because the mean of its divisors is an integer number (295580340).

Almost surely, 2^6618855768 is an apocalyptic number.

It is an amenable number.

6618855768 is an abundant number, since it is smaller than the sum of its proper divisors (12298285992).

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

6618855768 is a wasteful number, since it uses less digits than its factorization.

6618855768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12776 (or 12772 counting only the distinct ones).

The product of its digits is 19353600, while the sum is 60.

The square root of 6618855768 is about 81356.3505081195. The cubic root of 6618855768 is about 1877.5620813950.

The spelling of 6618855768 in words is "six billion, six hundred eighteen million, eight hundred fifty-five thousand, seven hundred sixty-eight".