66425644263 has 64 divisors (see below), whose sum is σ = 103323451392. Its totient is φ = 37513082880.

The previous prime is 66425644231. The next prime is 66425644267. The reversal of 66425644263 is 36244652466.

It is not a de Polignac number, because 66425644263 - 2⁵ = 66425644231 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66425644267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 60773145 + ... + 60774237.

It is an arithmetic number, because the mean of its divisors is an integer number (1614428928).

Almost surely, 2^66425644263 is an apocalyptic number.

66425644263 is a deficient number, since it is larger than the sum of its proper divisors (36897807129).

66425644263 is a wasteful number, since it uses less digits than its factorization.

66425644263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2104.

The product of its digits is 4976640, while the sum is 48.

The spelling of 66425644263 in words is "sixty-six billion, four hundred twenty-five million, six hundred forty-four thousand, two hundred sixty-three".