66564073235 has 16 divisors (see below), whose sum is σ = 87909567840. Its totient is φ = 47981821440.

The previous prime is 66564073211. The next prime is 66564073241. The reversal of 66564073235 is 53237046566.

It is not a de Polignac number, because 66564073235 - 2⁶ = 66564073171 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66564073235.

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, 5348900 + ... + 5361329.

It is an arithmetic number, because the mean of its divisors is an integer number (5494347990).

Almost surely, 2^66564073235 is an apocalyptic number.

66564073235 is a deficient number, since it is larger than the sum of its proper divisors (21345494605).

66564073235 is a wasteful number, since it uses less digits than its factorization.

66564073235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10710358.

The product of its (nonzero) digits is 2721600, while the sum is 47.

The spelling of 66564073235 in words is "sixty-six billion, five hundred sixty-four million, seventy-three thousand, two hundred thirty-five".