6531312132666 has 16 divisors (see below), whose sum is σ = 14514026961600. Its totient is φ = 2177104044204.

The previous prime is 6531312132623. The next prime is 6531312132671. The reversal of 6531312132666 is 6662312131356.

It is a Curzon 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, 60475112286 + ... + 60475112393.

It is an arithmetic number, because the mean of its divisors is an integer number (907126685100).

Almost surely, 2^{6531312132666} is an apocalyptic number.

6531312132666 is an abundant number, since it is smaller than the sum of its proper divisors (7982714828934).

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

6531312132666 is a wasteful number, since it uses less digits than its factorization.

6531312132666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120950224690 (or 120950224684 counting only the distinct ones).

The product of its digits is 699840, while the sum is 45.

The spelling of 6531312132666 in words is "six trillion, five hundred thirty-one billion, three hundred twelve million, one hundred thirty-two thousand, six hundred sixty-six".