266820987444 has 48 divisors (see below), whose sum is σ = 680278126080. Its totient is φ = 80724198240.

The previous prime is 266820987373. The next prime is 266820987469. The reversal of 266820987444 is 444789028662.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1551064 + ... + 1714479.

It is an arithmetic number, because the mean of its divisors is an integer number (14172460960).

Almost surely, 2^266820987444 is an apocalyptic number.

It is an amenable number.

266820987444 is an abundant number, since it is smaller than the sum of its proper divisors (413457138636).

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

266820987444 is a wasteful number, since it uses less digits than its factorization.

266820987444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3266180 (or 3266178 counting only the distinct ones).

The product of its (nonzero) digits is 37158912, while the sum is 60.

The spelling of 266820987444 in words is "two hundred sixty-six billion, eight hundred twenty million, nine hundred eighty-seven thousand, four hundred forty-four".