6661560660756 has 24 divisors (see below), whose sum is σ = 15552224497824. Its totient is φ = 2219294083680.

The previous prime is 6661560660739. The next prime is 6661560660779. The reversal of 6661560660756 is 6570660651666.

It is a self number, because there is not a number n which added to its sum of digits gives 6661560660756.

It is a congruent number.

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, 153244435 + ... + 153287898.

It is an arithmetic number, because the mean of its divisors is an integer number (648009354076).

Almost surely, 2^{6661560660756} is an apocalyptic number.

It is an amenable number.

6661560660756 is an abundant number, since it is smaller than the sum of its proper divisors (8890663837068).

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

6661560660756 is a wasteful number, since it uses less digits than its factorization.

6661560660756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306534151 (or 306534149 counting only the distinct ones).

The product of its (nonzero) digits is 48988800, while the sum is 60.

The spelling of 6661560660756 in words is "six trillion, six hundred sixty-one billion, five hundred sixty million, six hundred sixty thousand, seven hundred fifty-six".