66746400585 has 16 divisors (see below), whose sum is σ = 106918009344. Its totient is φ = 35556824192.

The previous prime is 66746400577. The next prime is 66746400599. The reversal of 66746400585 is 58500464766.

It is a cyclic number.

It is not a de Polignac number, because 66746400585 - 2³ = 66746400577 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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, 2565132 + ... + 2591021.

It is an arithmetic number, because the mean of its divisors is an integer number (6682375584).

Almost surely, 2^66746400585 is an apocalyptic number.

It is an amenable number.

66746400585 is a deficient number, since it is larger than the sum of its proper divisors (40171608759).

66746400585 is a wasteful number, since it uses less digits than its factorization.

66746400585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5157024.

The product of its (nonzero) digits is 4838400, while the sum is 51.

The spelling of 66746400585 in words is "sixty-six billion, seven hundred forty-six million, four hundred thousand, five hundred eighty-five".