666344666226 has 8 divisors (see below), whose sum is σ = 1332689332464. Its totient is φ = 222114888740.

The previous prime is 666344666209. The next prime is 666344666227. The reversal of 666344666226 is 622666443666.

It is a happy number.

666344666226 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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

666344666226 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (666344666227) 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, 55528722180 + ... + 55528722191.

It is an arithmetic number, because the mean of its divisors is an integer number (166586166558).

Almost surely, 2^666344666226 is an apocalyptic number.

666344666226 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

666344666226 is a wasteful number, since it uses less digits than its factorization.

666344666226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111057444376.

The product of its digits is 53747712, while the sum is 57.

The spelling of 666344666226 in words is "six hundred sixty-six billion, three hundred forty-four million, six hundred sixty-six thousand, two hundred twenty-six".