666105560616 has 16 divisors (see below), whose sum is σ = 1665263901600. Its totient is φ = 222035186864.

The previous prime is 666105560609. The next prime is 666105560633. The reversal of 666105560616 is 616065501666.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13877199156 + ... + 13877199203.

It is an arithmetic number, because the mean of its divisors is an integer number (104078993850).

Almost surely, 2^666105560616 is an apocalyptic number.

It is an amenable number.

666105560616 is an abundant number, since it is smaller than the sum of its proper divisors (999158340984).

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

666105560616 is a wasteful number, since it uses less digits than its factorization.

666105560616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27754398368 (or 27754398364 counting only the distinct ones).

The product of its (nonzero) digits is 1166400, while the sum is 48.

The spelling of 666105560616 in words is "six hundred sixty-six billion, one hundred five million, five hundred sixty thousand, six hundred sixteen".