266220066120016 has 40 divisors (see below), whose sum is σ = 525535521759144. Its totient is φ = 130598015508480.

The previous prime is 266220066120007. The next prime is 266220066120061. The reversal of 266220066120016 is 610021660022662.

It can be written as a sum of positive squares in 4 ways, for example, as 116830070969616 + 149389995150400 = 10808796^2 + 12222520^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 312385560 + ... + 313236616.

Almost surely, 2^{266220066120016} is an apocalyptic number.

It is an amenable number.

266220066120016 is a deficient number, since it is larger than the sum of its proper divisors (259315455639128).

266220066120016 is a wasteful number, since it uses less digits than its factorization.

266220066120016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1219999 (or 1219993 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 40.

The spelling of 266220066120016 in words is "two hundred sixty-six trillion, two hundred twenty billion, sixty-six million, one hundred twenty thousand, sixteen".