6605561604 has 24 divisors (see below), whose sum is σ = 15829545088. Its totient is φ = 2142344160.

The previous prime is 6605561597. The next prime is 6605561621. The reversal of 6605561604 is 4061655066.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7438252 + ... + 7439139.

Almost surely, 2^6605561604 is an apocalyptic number.

It is an amenable number.

6605561604 is an abundant number, since it is smaller than the sum of its proper divisors (9223983484).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6605561604 is a wasteful number, since it uses less digits than its factorization.

6605561604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14877435 (or 14877433 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 39.

The square root of 6605561604 is about 81274.6061448470. The cubic root of 6605561604 is about 1876.3041928640.

The spelling of 6605561604 in words is "six billion, six hundred five million, five hundred sixty-one thousand, six hundred four".