6666555611504 has 80 divisors (see below), whose sum is σ = 13199432310240. Its totient is φ = 3261198412800.

The previous prime is 6666555611501. The next prime is 6666555611539. The reversal of 6666555611504 is 4051165556666.

It is a self number, because there is not a number n which added to its sum of digits gives 6666555611504.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 65650979 + ... + 65752445.

It is an arithmetic number, because the mean of its divisors is an integer number (164992903878).

Almost surely, 2^{6666555611504} is an apocalyptic number.

It is an amenable number.

6666555611504 is a deficient number, since it is larger than the sum of its proper divisors (6532876698736).

6666555611504 is a wasteful number, since it uses less digits than its factorization.

6666555611504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102058 (or 102052 counting only the distinct ones).

The product of its (nonzero) digits is 19440000, while the sum is 56.

The spelling of 6666555611504 in words is "six trillion, six hundred sixty-six billion, five hundred fifty-five million, six hundred eleven thousand, five hundred four".