666140615746066 has 16 divisors (see below), whose sum is σ = 1002504532851360. Its totient is φ = 331972522221600.

The previous prime is 666140615746043. The next prime is 666140615746117. The reversal of 666140615746066 is 660647516041666.

666140615746066 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 666140615745989 and 666140615746007.

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, 5157235 + ... + 36862966.

It is an arithmetic number, because the mean of its divisors is an integer number (62656533303210).

Almost surely, 2^{666140615746066} is an apocalyptic number.

666140615746066 is a deficient number, since it is larger than the sum of its proper divisors (336363917105294).

666140615746066 is a wasteful number, since it uses less digits than its factorization.

666140615746066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42046329.

The product of its (nonzero) digits is 156764160, while the sum is 64.

The spelling of 666140615746066 in words is "six hundred sixty-six trillion, one hundred forty billion, six hundred fifteen million, seven hundred forty-six thousand, sixty-six".