66236263513 has 16 divisors (see below), whose sum is σ = 77141465856. Its totient is φ = 55692187200.

The previous prime is 66236263477. The next prime is 66236263517. The reversal of 66236263513 is 31536263266.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66236263513 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66236263513.

It is not an unprimeable number, because it can be changed into a prime (66236263517) 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 15 ways as a sum of consecutive naturals, for example, 2416795 + ... + 2444047.

It is an arithmetic number, because the mean of its divisors is an integer number (4821341616).

Almost surely, 2^66236263513 is an apocalyptic number.

It is an amenable number.

66236263513 is a deficient number, since it is larger than the sum of its proper divisors (10905202343).

66236263513 is a wasteful number, since it uses less digits than its factorization.

66236263513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33864.

The product of its digits is 699840, while the sum is 43.

The spelling of 66236263513 in words is "sixty-six billion, two hundred thirty-six million, two hundred sixty-three thousand, five hundred thirteen".