266220726288 has 80 divisors (see below), whose sum is σ = 752421056256. Its totient is φ = 80440405120.

The previous prime is 266220726281. The next prime is 266220726293. The reversal of 266220726288 is 882627022662.

It is a self number, because there is not a number n which added to its sum of digits gives 266220726288.

It is not an unprimeable number, because it can be changed into a prime (266220726281) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 543306 + ... + 909737.

Almost surely, 2^266220726288 is an apocalyptic number.

It is an amenable number.

266220726288 is an abundant number, since it is smaller than the sum of its proper divisors (486200329968).

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

266220726288 is a wasteful number, since it uses less digits than its factorization.

266220726288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1453412 (or 1453406 counting only the distinct ones).

The product of its (nonzero) digits is 3096576, while the sum is 51.

The spelling of 266220726288 in words is "two hundred sixty-six billion, two hundred twenty million, seven hundred twenty-six thousand, two hundred eighty-eight".