666226604244 has 12 divisors (see below), whose sum is σ = 1554528743264. Its totient is φ = 222075534744.

The previous prime is 666226604227. The next prime is 666226604257. The reversal of 666226604244 is 442406622666.

666226604244 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 666226604193 and 666226604202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27759441832 + ... + 27759441855.

Almost surely, 2^666226604244 is an apocalyptic number.

It is an amenable number.

666226604244 is an abundant number, since it is smaller than the sum of its proper divisors (888302139020).

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

666226604244 is a wasteful number, since it uses less digits than its factorization.

666226604244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55518883694 (or 55518883692 counting only the distinct ones).

The product of its (nonzero) digits is 3981312, while the sum is 48.

The spelling of 666226604244 in words is "six hundred sixty-six billion, two hundred twenty-six million, six hundred four thousand, two hundred forty-four".