266043642264550 has 12 divisors (see below), whose sum is σ = 494841174612156. Its totient is φ = 106417456905800.

The previous prime is 266043642264527. The next prime is 266043642264581. The reversal of 266043642264550 is 55462246340662.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 266043642264491 and 266043642264500.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2660436422596 + ... + 2660436422695.

It is an arithmetic number, because the mean of its divisors is an integer number (41236764551013).

Almost surely, 2^{266043642264550} is an apocalyptic number.

266043642264550 is a deficient number, since it is larger than the sum of its proper divisors (228797532347606).

266043642264550 is a wasteful number, since it uses less digits than its factorization.

266043642264550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5320872845303 (or 5320872845298 counting only the distinct ones).

The product of its (nonzero) digits is 49766400, while the sum is 55.

The spelling of 266043642264550 in words is "two hundred sixty-six trillion, forty-three billion, six hundred forty-two million, two hundred sixty-four thousand, five hundred fifty".