6665528255666 has 32 divisors (see below), whose sum is σ = 12192788357760. Its totient is φ = 2669232030336.

The previous prime is 6665528255663. The next prime is 6665528255693.

6665528255666 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×6665528255666² (a number of 26 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6665528255596 and 6665528255605.

It is not an unprimeable number, because it can be changed into a prime (6665528255663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 171613301 + ... + 171652136.

It is an arithmetic number, because the mean of its divisors is an integer number (381024636180).

Almost surely, 2^{6665528255666} is an apocalyptic number.

6665528255666 is a deficient number, since it is larger than the sum of its proper divisors (5527260102094).

6665528255666 is a wasteful number, since it uses less digits than its factorization.

6665528255666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343265538.

The product of its digits is 933120000, while the sum is 68.

The spelling of 6665528255666 in words is "six trillion, six hundred sixty-five billion, five hundred twenty-eight million, two hundred fifty-five thousand, six hundred sixty-six".