66056594978305 has 16 divisors (see below), whose sum is σ = 83440172027520. Its totient is φ = 50063788119168.

The previous prime is 66056594978293. The next prime is 66056594978327. The reversal of 66056594978305 is 50387949565066.

It is a cyclic number.

It is not a de Polignac number, because 66056594978305 - 2⁷ = 66056594978177 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35748189 + ... + 37550581.

It is an arithmetic number, because the mean of its divisors is an integer number (5215010751720).

Almost surely, 2^{66056594978305} is an apocalyptic number.

It is an amenable number.

66056594978305 is a deficient number, since it is larger than the sum of its proper divisors (17383577049215).

66056594978305 is a wasteful number, since it uses less digits than its factorization.

66056594978305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2188200.

The product of its (nonzero) digits is 1469664000, while the sum is 73.

The spelling of 66056594978305 in words is "sixty-six trillion, fifty-six billion, five hundred ninety-four million, nine hundred seventy-eight thousand, three hundred five".