66086265687 has 16 divisors (see below), whose sum is σ = 94899530880. Its totient is φ = 40665714912.

The previous prime is 66086265653. The next prime is 66086265697. The reversal of 66086265687 is 78656268066.

It is a happy number.

It is not a de Polignac number, because 66086265687 - 2²³ = 66077877079 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66086265687.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66086265607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 629364 + ... + 726822.

It is an arithmetic number, because the mean of its divisors is an integer number (5931220680).

Almost surely, 2^66086265687 is an apocalyptic number.

66086265687 is a deficient number, since it is larger than the sum of its proper divisors (28813265193).

66086265687 is a wasteful number, since it uses less digits than its factorization.

66086265687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114862.

The product of its (nonzero) digits is 34836480, while the sum is 60.

The spelling of 66086265687 in words is "sixty-six billion, eighty-six million, two hundred sixty-five thousand, six hundred eighty-seven".