66560700557918 has 16 divisors (see below), whose sum is σ = 114104172165984. Its totient is φ = 28525986008160.

The previous prime is 66560700557899. The next prime is 66560700557921. The reversal of 66560700557918 is 81975500706566.

It is a Curzon number.

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, 18379796 + ... + 21701112.

It is an arithmetic number, because the mean of its divisors is an integer number (7131510760374).

Almost surely, 2^{66560700557918} is an apocalyptic number.

66560700557918 is a deficient number, since it is larger than the sum of its proper divisors (47543471608066).

66560700557918 is a wasteful number, since it uses less digits than its factorization.

66560700557918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4752787.

The product of its (nonzero) digits is 95256000, while the sum is 65.

The spelling of 66560700557918 in words is "sixty-six trillion, five hundred sixty billion, seven hundred million, five hundred fifty-seven thousand, nine hundred eighteen".