6666844486666 has 32 divisors (see below), whose sum is σ = 12308295662208. Its totient is φ = 2637374040000.

The previous prime is 6666844486661. The next prime is 6666844486703.

It is a happy number.

6666844486666 is nontrivially palindromic in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 6666844486592 and 6666844486601.

It is not an unprimeable number, because it can be changed into a prime (6666844486661) 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, 8259601 + ... + 9030763.

It is an arithmetic number, because the mean of its divisors is an integer number (384634239444).

Almost surely, 2^{6666844486666} is an apocalyptic number.

6666844486666 is a deficient number, since it is larger than the sum of its proper divisors (5641451175542).

6666844486666 is a wasteful number, since it uses less digits than its factorization.

6666844486666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 818686.

The product of its digits is 6879707136, while the sum is 76.

The spelling of 6666844486666 in words is "six trillion, six hundred sixty-six billion, eight hundred forty-four million, four hundred eighty-six thousand, six hundred sixty-six".