6613216533 has 48 divisors (see below), whose sum is σ = 11981039616. Its totient is φ = 3414805920.

The previous prime is 6613216471. The next prime is 6613216541. The reversal of 6613216533 is 3356123166.

6613216533 is a `hidden beast` number, since 6 + 613 + 2 + 1 + 6 + 5 + 33 = 666.

It is not a de Polignac number, because 6613216533 - 2⁹ = 6613216021 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6613216333) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 87160 + ... + 144302.

It is an arithmetic number, because the mean of its divisors is an integer number (249604992).

Almost surely, 2^6613216533 is an apocalyptic number.

6613216533 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

It is an amenable number.

6613216533 is a deficient number, since it is larger than the sum of its proper divisors (5367823083).

6613216533 is a wasteful number, since it uses less digits than its factorization.

6613216533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57334 (or 57331 counting only the distinct ones).

The product of its digits is 58320, while the sum is 36.

The square root of 6613216533 is about 81321.6855026997. The cubic root of 6613216533 is about 1877.0287051047.

Adding to 6613216533 its reverse (3356123166), we get a palindrome (9969339699).

It can be divided in two parts, 66132 and 16533, that multiplied together give a square (1093360356 = 33066²).

The spelling of 6613216533 in words is "six billion, six hundred thirteen million, two hundred sixteen thousand, five hundred thirty-three".