6566610565 has 16 divisors (see below), whose sum is σ = 7992686592. Its totient is φ = 5178648384.

The previous prime is 6566610559. The next prime is 6566610599. The reversal of 6566610565 is 5650166656.

It is a cyclic number.

It is not a de Polignac number, because 6566610565 - 2⁹ = 6566610053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66762 + ... + 132628.

It is an arithmetic number, because the mean of its divisors is an integer number (499542912).

Almost surely, 2^6566610565 is an apocalyptic number.

It is an amenable number.

6566610565 is a deficient number, since it is larger than the sum of its proper divisors (1426076027).

6566610565 is a wasteful number, since it uses less digits than its factorization.

6566610565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66156.

The product of its (nonzero) digits is 972000, while the sum is 46.

The square root of 6566610565 is about 81034.6257164183. The cubic root of 6566610565 is about 1872.6089167622.

The spelling of 6566610565 in words is "six billion, five hundred sixty-six million, six hundred ten thousand, five hundred sixty-five".