6668367515820 has 96 divisors (see below), whose sum is σ = 20752650878400. Its totient is φ = 1777664028672.

The previous prime is 6668367515819. The next prime is 6668367515861. The reversal of 6668367515820 is 285157638666.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 274275 + ... + 3662234.

It is an arithmetic number, because the mean of its divisors is an integer number (216173446650).

Almost surely, 2^{6668367515820} is an apocalyptic number.

6668367515820 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6668367515820 is an abundant number, since it is smaller than the sum of its proper divisors (14084283362580).

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

6668367515820 is a wasteful number, since it uses less digits than its factorization.

6668367515820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3939664 (or 3939656 counting only the distinct ones).

The product of its (nonzero) digits is 87091200, while the sum is 63.

The spelling of 6668367515820 in words is "six trillion, six hundred sixty-eight billion, three hundred sixty-seven million, five hundred fifteen thousand, eight hundred twenty".