6601560561566 has 32 divisors (see below), whose sum is σ = 10613582254080. Its totient is φ = 3071520292896.

The previous prime is 6601560561523. The next prime is 6601560561577. The reversal of 6601560561566 is 6651650651066.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12483845 + ... + 13001903.

It is an arithmetic number, because the mean of its divisors is an integer number (331674445440).

Almost surely, 2^{6601560561566} is an apocalyptic number.

6601560561566 is a deficient number, since it is larger than the sum of its proper divisors (4012021692514).

6601560561566 is a wasteful number, since it uses less digits than its factorization.

6601560561566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 525608.

The product of its (nonzero) digits is 5832000, while the sum is 53.

The spelling of 6601560561566 in words is "six trillion, six hundred one billion, five hundred sixty million, five hundred sixty-one thousand, five hundred sixty-six".