6565555166066 has 8 divisors (see below), whose sum is σ = 10605896806764. Its totient is φ = 3030256230480.

The previous prime is 6565555166047. The next prime is 6565555166069. The reversal of 6565555166066 is 6606615555656.

It can be written as a sum of positive squares in 2 ways, for example, as 5211289980625 + 1354265185441 = 2282825^2 + 1163729^2 .

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

It is not an unprimeable number, because it can be changed into a prime (6565555166069) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 126260676245 + ... + 126260676296.

Almost surely, 2^{6565555166066} is an apocalyptic number.

6565555166066 is a deficient number, since it is larger than the sum of its proper divisors (4040341640698).

6565555166066 is a wasteful number, since it uses less digits than its factorization.

6565555166066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252521352556.

The product of its (nonzero) digits is 145800000, while the sum is 62.

The spelling of 6565555166066 in words is "six trillion, five hundred sixty-five billion, five hundred fifty-five million, one hundred sixty-six thousand, sixty-six".