6531666112361 has 16 divisors (see below), whose sum is σ = 7063153703424. Its totient is φ = 6004370260224.

The previous prime is 6531666112357. The next prime is 6531666112417. The reversal of 6531666112361 is 1632116661356.

It is a cyclic number.

It is not a de Polignac number, because 6531666112361 - 2² = 6531666112357 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6531666112351) 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, 2917010 + ... + 4644596.

It is an arithmetic number, because the mean of its divisors is an integer number (441447106464).

Almost surely, 2^{6531666112361} is an apocalyptic number.

It is an amenable number.

6531666112361 is a deficient number, since it is larger than the sum of its proper divisors (531487591063).

6531666112361 is a wasteful number, since it uses less digits than its factorization.

6531666112361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1728800.

The product of its digits is 699840, while the sum is 47.

The spelling of 6531666112361 in words is "six trillion, five hundred thirty-one billion, six hundred sixty-six million, one hundred twelve thousand, three hundred sixty-one".