66550334533 has 4 divisors (see below), whose sum is σ = 66594032928. Its totient is φ = 66506636140.

The previous prime is 66550334527. The next prime is 66550334549. The reversal of 66550334533 is 33543305566.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66550334533 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66550334533.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66550334563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21846913 + ... + 21849958.

It is an arithmetic number, because the mean of its divisors is an integer number (16648508232).

Almost surely, 2^66550334533 is an apocalyptic number.

It is an amenable number.

66550334533 is a deficient number, since it is larger than the sum of its proper divisors (43698395).

66550334533 is a wasteful number, since it uses less digits than its factorization.

66550334533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43698394.

The product of its (nonzero) digits is 1458000, while the sum is 43.

It can be divided in two parts, 6655033 and 4533, that added together give a palindrome (6659566).

The spelling of 66550334533 in words is "sixty-six billion, five hundred fifty million, three hundred thirty-four thousand, five hundred thirty-three".