6656565602063 has 4 divisors (see below), whose sum is σ = 7168609109928. Its totient is φ = 6144522094200.

The previous prime is 6656565602059. The next prime is 6656565602069. The reversal of 6656565602063 is 3602065656566.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6656565602063 - 2² = 6656565602059 is a prime.

It is a super-2 number, since 2×6656565602063² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6656565602069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 256021753913 + ... + 256021753938.

It is an arithmetic number, because the mean of its divisors is an integer number (1792152277482).

Almost surely, 2^{6656565602063} is an apocalyptic number.

6656565602063 is a deficient number, since it is larger than the sum of its proper divisors (512043507865).

6656565602063 is a wasteful number, since it uses less digits than its factorization.

6656565602063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 512043507864.

The product of its (nonzero) digits is 34992000, while the sum is 56.

The spelling of 6656565602063 in words is "six trillion, six hundred fifty-six billion, five hundred sixty-five million, six hundred two thousand, sixty-three".