6666555611500 has 24 divisors (see below), whose sum is σ = 14559757456608. Its totient is φ = 2666622244400.

The previous prime is 6666555611491. The next prime is 6666555611501. The reversal of 6666555611500 is 51165556666.

It is not an unprimeable number, because it can be changed into a prime (6666555611501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6666555112 + ... + 6666556111.

It is an arithmetic number, because the mean of its divisors is an integer number (606656560692).

Almost surely, 2^{6666555611500} is an apocalyptic number.

It is an amenable number.

6666555611500 is an abundant number, since it is smaller than the sum of its proper divisors (7893201845108).

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

6666555611500 is a wasteful number, since it uses less digits than its factorization.

6666555611500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13333111242 (or 13333111230 counting only the distinct ones).

The product of its (nonzero) digits is 4860000, while the sum is 52.

The spelling of 6666555611500 in words is "six trillion, six hundred sixty-six billion, five hundred fifty-five million, six hundred eleven thousand, five hundred".