666323323666 has 128 divisors (see below), whose sum is σ = 1413338572800. Its totient is φ = 226904924160.

The previous prime is 666323323661. The next prime is 666323323681.

666323323666 is nontrivially palindromic in base 10.

666323323666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×666323323666² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (666323323661) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 102052690 + ... + 102059218.

It is an arithmetic number, because the mean of its divisors is an integer number (11041707600).

Almost surely, 2^666323323666 is an apocalyptic number.

666323323666 is an abundant number, since it is smaller than the sum of its proper divisors (747015249134).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

666323323666 is a wasteful number, since it uses less digits than its factorization.

666323323666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9264.

The product of its digits is 15116544, while the sum is 52.

It can be divided in two parts, 666323 and 323666, that added together give a palindrome (989989).

The spelling of 666323323666 in words is "six hundred sixty-six billion, three hundred twenty-three million, three hundred twenty-three thousand, six hundred sixty-six".