6678687660 has 48 divisors (see below), whose sum is σ = 19800347616. Its totient is φ = 1676219392.

The previous prime is 6678687637. The next prime is 6678687667. The reversal of 6678687660 is 667868766.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a junction number, because it is equal to n+sod(n) for n = 6678687594 and 6678687603.

It is not an unprimeable number, because it can be changed into a prime (6678687667) by changing a digit.

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, 3272847 + ... + 3274886.

It is an arithmetic number, because the mean of its divisors is an integer number (412507242).

Almost surely, 2^6678687660 is an apocalyptic number.

6678687660 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6678687660 is an abundant number, since it is smaller than the sum of its proper divisors (13121659956).

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

6678687660 is a wasteful number, since it uses less digits than its factorization.

6678687660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6547762 (or 6547760 counting only the distinct ones).

The product of its (nonzero) digits is 24385536, while the sum is 60.

The square root of 6678687660 is about 81723.2381884125. The cubic root of 6678687660 is about 1883.2025973066.

The spelling of 6678687660 in words is "six billion, six hundred seventy-eight million, six hundred eighty-seven thousand, six hundred sixty".