6660116155566 has 24 divisors (see below), whose sum is σ = 14479501687560. Its totient is φ = 2212461792816.

The previous prime is 6660116155549. The next prime is 6660116155613. The reversal of 6660116155566 is 6655516110666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 631405056 + ... + 631415603.

It is an arithmetic number, because the mean of its divisors is an integer number (603312570315).

Almost surely, 2^{6660116155566} is an apocalyptic number.

6660116155566 is an abundant number, since it is smaller than the sum of its proper divisors (7819385531994).

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

6660116155566 is a wasteful number, since it uses less digits than its factorization.

6660116155566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1262820960 (or 1262820957 counting only the distinct ones).

The product of its (nonzero) digits is 5832000, while the sum is 54.

The spelling of 6660116155566 in words is "six trillion, six hundred sixty billion, one hundred sixteen million, one hundred fifty-five thousand, five hundred sixty-six".