6613222521 has 8 divisors (see below), whose sum is σ = 8866346944. Its totient is φ = 4384456560.

The previous prime is 6613222481. The next prime is 6613222523. The reversal of 6613222521 is 1252223166.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6613222521 - 2¹⁰ = 6613221497 is a prime.

It is a super-2 number, since 2×6613222521² = 87469424224523190882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6613222523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6088981 + ... + 6090066.

It is an arithmetic number, because the mean of its divisors is an integer number (1108293368).

Almost surely, 2^6613222521 is an apocalyptic number.

It is an amenable number.

6613222521 is a deficient number, since it is larger than the sum of its proper divisors (2253124423).

6613222521 is a wasteful number, since it uses less digits than its factorization.

6613222521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12179231.

The product of its digits is 8640, while the sum is 30.

The square root of 6613222521 is about 81321.7223194393. The cubic root of 6613222521 is about 1877.0292716290.

Adding to 6613222521 its reverse (1252223166), we get a palindrome (7865445687).

The spelling of 6613222521 in words is "six billion, six hundred thirteen million, two hundred twenty-two thousand, five hundred twenty-one".