266004213340242 has 128 divisors (see below), whose sum is σ = 606116181484800. Its totient is φ = 77245844143104.

The previous prime is 266004213340223. The next prime is 266004213340247. The reversal of 266004213340242 is 242043312400662.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 266004213340242.

It is not an unprimeable number, because it can be changed into a prime (266004213340247) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 28125153 + ... + 36373515.

It is an arithmetic number, because the mean of its divisors is an integer number (4735282667850).

Almost surely, 2^{266004213340242} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 266004213340242, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (303058090742400).

266004213340242 is an abundant number, since it is smaller than the sum of its proper divisors (340111968144558).

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

266004213340242 is a wasteful number, since it uses less digits than its factorization.

266004213340242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8248732.

The product of its (nonzero) digits is 331776, while the sum is 39.

The spelling of 266004213340242 in words is "two hundred sixty-six trillion, four billion, two hundred thirteen million, three hundred forty thousand, two hundred forty-two".