6556511060665 has 8 divisors (see below), whose sum is σ = 7867827922248. Its totient is φ = 5245199082240.

The previous prime is 6556511060629. The next prime is 6556511060677. The reversal of 6556511060665 is 5660601156556.

It can be written as a sum of positive squares in 4 ways, for example, as 3069279748096 + 3487231312569 = 1751936^2 + 1867413^2 .

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

It is not a de Polignac number, because 6556511060665 - 2²⁹ = 6555974189753 is a prime.

It is a Duffinian number.

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, 3166459 + ... + 4810351.

It is an arithmetic number, because the mean of its divisors is an integer number (983478490281).

Almost surely, 2^{6556511060665} is an apocalyptic number.

It is an amenable number.

6556511060665 is a deficient number, since it is larger than the sum of its proper divisors (1311316861583).

6556511060665 is a wasteful number, since it uses less digits than its factorization.

6556511060665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2441579.

The product of its (nonzero) digits is 4860000, while the sum is 52.

The spelling of 6556511060665 in words is "six trillion, five hundred fifty-six billion, five hundred eleven million, sixty thousand, six hundred sixty-five".