666404623233076 has 48 divisors (see below), whose sum is σ = 1497738818790144. Its totient is φ = 252170311320576.

The previous prime is 666404623233073. The next prime is 666404623233091. The reversal of 666404623233076 is 670332326404666.

It is a self number, because there is not a number n which added to its sum of digits gives 666404623233076.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666404623233071) 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 15 ways as a sum of consecutive naturals, for example, 39799598845 + ... + 39799615588.

It is an arithmetic number, because the mean of its divisors is an integer number (31202892058128).

Almost surely, 2^{666404623233076} is an apocalyptic number.

It is an amenable number.

666404623233076 is an abundant number, since it is smaller than the sum of its proper divisors (831334195557068).

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

666404623233076 is a wasteful number, since it uses less digits than its factorization.

666404623233076 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79599214480 (or 79599214478 counting only the distinct ones).

The product of its (nonzero) digits is 94058496, while the sum is 58.

The spelling of 666404623233076 in words is "six hundred sixty-six trillion, four hundred four billion, six hundred twenty-three million, two hundred thirty-three thousand, seventy-six".