266562161556 has 12 divisors (see below), whose sum is σ = 621978376992. Its totient is φ = 88854053848.

The previous prime is 266562161519. The next prime is 266562161557. The reversal of 266562161556 is 655161265662.

266562161556 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×266562161556² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 266562161499 and 266562161508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266562161557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11106756720 + ... + 11106756743.

It is an arithmetic number, because the mean of its divisors is an integer number (51831531416).

Almost surely, 2^266562161556 is an apocalyptic number.

It is an amenable number.

266562161556 is an abundant number, since it is smaller than the sum of its proper divisors (355416215436).

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

266562161556 is a wasteful number, since it uses less digits than its factorization.

266562161556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22213513470 (or 22213513468 counting only the distinct ones).

The product of its digits is 3888000, while the sum is 51.

The spelling of 266562161556 in words is "two hundred sixty-six billion, five hundred sixty-two million, one hundred sixty-one thousand, five hundred fifty-six".