266642444 has 12 divisors (see below), whose sum is σ = 469715568. Its totient is φ = 132438000.

The previous prime is 266642437. The next prime is 266642477. The reversal of 266642444 is 444246662.

It is a junction number, because it is equal to n+sod(n) for n = 266642398 and 266642407.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 220127 + ... + 221334.

It is an arithmetic number, because the mean of its divisors is an integer number (39142964).

Almost surely, 2^266642444 is an apocalyptic number.

It is an amenable number.

266642444 is a deficient number, since it is larger than the sum of its proper divisors (203073124).

266642444 is a wasteful number, since it uses less digits than its factorization.

266642444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 441616 (or 441614 counting only the distinct ones).

The product of its digits is 221184, while the sum is 38.

The square root of 266642444 is about 16329.1899370422. The cubic root of 266642444 is about 643.6401002074.

The spelling of 266642444 in words is "two hundred sixty-six million, six hundred forty-two thousand, four hundred forty-four".