6666680808080 has 40 divisors (see below), whose sum is σ = 15860498767872. Its totient is φ = 2604656686464.

The previous prime is 6666680808071. The next prime is 6666680808131. The reversal of 6666680808080 is 808080866666.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-4 number, since 4×6666680808080⁴ (a number of 52 digits) contains 4444 as substring.

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, 968990864 + ... + 968997743.

Almost surely, 2^{6666680808080} is an apocalyptic number.

It is an amenable number.

6666680808080 is an abundant number, since it is smaller than the sum of its proper divisors (9193817959792).

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

6666680808080 is a wasteful number, since it uses less digits than its factorization.

6666680808080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1937988663 (or 1937988657 counting only the distinct ones).

The product of its (nonzero) digits is 31850496, while the sum is 62.

The spelling of 6666680808080 in words is "six trillion, six hundred sixty-six billion, six hundred eighty million, eight hundred eight thousand, eighty".