266855581126 has 4 divisors (see below), whose sum is σ = 400283371692. Its totient is φ = 133427790562.

The previous prime is 266855581117. The next prime is 266855581189. The reversal of 266855581126 is 621185558662.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66713895280 + ... + 66713895283.

It is an arithmetic number, because the mean of its divisors is an integer number (100070842923).

Almost surely, 2^266855581126 is an apocalyptic number.

266855581126 is a deficient number, since it is larger than the sum of its proper divisors (133427790566).

266855581126 is a wasteful number, since it uses less digits than its factorization.

266855581126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133427790565.

The product of its digits is 6912000, while the sum is 55.

The spelling of 266855581126 in words is "two hundred sixty-six billion, eight hundred fifty-five million, five hundred eighty-one thousand, one hundred twenty-six".