6678349640940 has 24 divisors (see below), whose sum is σ = 18699378994800. Its totient is φ = 1780893237568.

The previous prime is 6678349640939. The next prime is 6678349641017. The reversal of 6678349640940 is 490469438766.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55652913615 + ... + 55652913734.

It is an arithmetic number, because the mean of its divisors is an integer number (779140791450).

Almost surely, 2^{6678349640940} is an apocalyptic number.

6678349640940 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6678349640940 is an abundant number, since it is smaller than the sum of its proper divisors (12021029353860).

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

6678349640940 is a wasteful number, since it uses less digits than its factorization.

6678349640940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111305827361 (or 111305827359 counting only the distinct ones).

The product of its (nonzero) digits is 188116992, while the sum is 66.

The spelling of 6678349640940 in words is "six trillion, six hundred seventy-eight billion, three hundred forty-nine million, six hundred forty thousand, nine hundred forty".