66255969753 has 6 divisors (see below), whose sum is σ = 95703067434. Its totient is φ = 44170646496.

The previous prime is 66255969739. The next prime is 66255969763. The reversal of 66255969753 is 35796955266.

66255969753 is a `hidden beast` number, since 6 + 6 + 2 + 559 + 6 + 9 + 75 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 47281458249 + 18974511504 = 217443^2 + 137748^2 .

It is not a de Polignac number, because 66255969753 - 2¹³ = 66255961561 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66255969763) 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 5 ways as a sum of consecutive naturals, for example, 3680887200 + ... + 3680887217.

It is an arithmetic number, because the mean of its divisors is an integer number (15950511239).

Almost surely, 2^66255969753 is an apocalyptic number.

It is an amenable number.

66255969753 is a deficient number, since it is larger than the sum of its proper divisors (29447097681).

66255969753 is a wasteful number, since it uses less digits than its factorization.

66255969753 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7361774423 (or 7361774420 counting only the distinct ones).

The product of its digits is 91854000, while the sum is 63.

The spelling of 66255969753 in words is "sixty-six billion, two hundred fifty-five million, nine hundred sixty-nine thousand, seven hundred fifty-three".