266642105445444 has 24 divisors (see below), whose sum is σ = 622170844807680. Its totient is φ = 88879854372064.

The previous prime is 266642105445427. The next prime is 266642105445491. The reversal of 266642105445444 is 444544501246662.

It is a happy number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 104618724 + ... + 107137115.

It is an arithmetic number, because the mean of its divisors is an integer number (25923785200320).

Almost surely, 2^{266642105445444} is an apocalyptic number.

It is an amenable number.

266642105445444 is an abundant number, since it is smaller than the sum of its proper divisors (355528739362236).

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

266642105445444 is a wasteful number, since it uses less digits than its factorization.

266642105445444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211860779 (or 211860777 counting only the distinct ones).

The product of its (nonzero) digits is 88473600, while the sum is 57.

The spelling of 266642105445444 in words is "two hundred sixty-six trillion, six hundred forty-two billion, one hundred five million, four hundred forty-five thousand, four hundred forty-four".