6565616004 has 12 divisors (see below), whose sum is σ = 15319770704. Its totient is φ = 2188538664.

The previous prime is 6565615967. The next prime is 6565616033. The reversal of 6565616004 is 4006165656.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 273567322 + ... + 273567345.

Almost surely, 2^6565616004 is an apocalyptic number.

It is an amenable number.

6565616004 is an abundant number, since it is smaller than the sum of its proper divisors (8754154700).

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

6565616004 is a wasteful number, since it uses less digits than its factorization.

6565616004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 547134674 (or 547134672 counting only the distinct ones).

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

The square root of 6565616004 is about 81028.4888418882. The cubic root of 6565616004 is about 1872.5143719021.

The spelling of 6565616004 in words is "six billion, five hundred sixty-five million, six hundred sixteen thousand, four".