66536610263 has 6 divisors (see below), whose sum is σ = 67683467184. Its totient is φ = 65408867684.

The previous prime is 66536610229. The next prime is 66536610299. The reversal of 66536610263 is 36201663566.

It is not a de Polignac number, because 66536610263 - 2¹² = 66536606167 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66536610223) 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, 9553631 + ... + 9560592.

It is an arithmetic number, because the mean of its divisors is an integer number (11280577864).

Almost surely, 2^66536610263 is an apocalyptic number.

66536610263 is a deficient number, since it is larger than the sum of its proper divisors (1146856921).

66536610263 is an equidigital number, since it uses as much as digits as its factorization.

66536610263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19114341 (or 19114282 counting only the distinct ones).

The product of its (nonzero) digits is 699840, while the sum is 44.

The spelling of 66536610263 in words is "sixty-six billion, five hundred thirty-six million, six hundred ten thousand, two hundred sixty-three".