6605020561 has 8 divisors (see below), whose sum is σ = 6897219264. Its totient is φ = 6313240560.

The previous prime is 6605020529. The next prime is 6605020613. The reversal of 6605020561 is 1650205066.

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

It is not a de Polignac number, because 6605020561 - 2⁵ = 6605020529 is a prime.

It is a super-2 number, since 2×6605020561² = 87252593222465509442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6605020511) 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, 72211 + ... + 135736.

It is an arithmetic number, because the mean of its divisors is an integer number (862152408).

Almost surely, 2^6605020561 is an apocalyptic number.

It is an amenable number.

6605020561 is a deficient number, since it is larger than the sum of its proper divisors (292198703).

6605020561 is a wasteful number, since it uses less digits than its factorization.

6605020561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209351.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 6605020561 is about 81271.2775893181. The cubic root of 6605020561 is about 1876.2529638629.

The spelling of 6605020561 in words is "six billion, six hundred five million, twenty thousand, five hundred sixty-one".