66566140466 has 16 divisors (see below), whose sum is σ = 118048328640. Its totient is φ = 27544609680.

The previous prime is 66566140451. The next prime is 66566140477. The reversal of 66566140466 is 66404166566.

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, 81977600 + ... + 81978411.

It is an arithmetic number, because the mean of its divisors is an integer number (7378020540).

Almost surely, 2^66566140466 is an apocalyptic number.

66566140466 is a deficient number, since it is larger than the sum of its proper divisors (51482188174).

66566140466 is a wasteful number, since it uses less digits than its factorization.

66566140466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163956049.

The product of its (nonzero) digits is 3732480, while the sum is 50.

The spelling of 66566140466 in words is "sixty-six billion, five hundred sixty-six million, one hundred forty thousand, four hundred sixty-six".