266121761072 has 20 divisors (see below), whose sum is σ = 515652188856. Its totient is φ = 133050228480.

The previous prime is 266121761051. The next prime is 266121761077. The reversal of 266121761072 is 270167121662.

It is not an unprimeable number, because it can be changed into a prime (266121761077) 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, 457673 + ... + 861224.

Almost surely, 2^266121761072 is an apocalyptic number.

It is an amenable number.

266121761072 is a deficient number, since it is larger than the sum of its proper divisors (249530427784).

266121761072 is a wasteful number, since it uses less digits than its factorization.

266121761072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1331516 (or 1331510 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 41.

The spelling of 266121761072 in words is "two hundred sixty-six billion, one hundred twenty-one million, seven hundred sixty-one thousand, seventy-two".