266043344404123 has 16 divisors (see below), whose sum is σ = 312554891934432. Its totient is φ = 223252818048000.

The previous prime is 266043344404093. The next prime is 266043344404213. The reversal of 266043344404123 is 321404443340662.

It is a happy number.

It is not a de Polignac number, because 266043344404123 - 2¹³ = 266043344395931 is a prime.

It is a super-2 number, since 2×266043344404123² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (266043344404223) 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, 150196293 + ... + 151957273.

It is an arithmetic number, because the mean of its divisors is an integer number (19534680745902).

Almost surely, 2^{266043344404123} is an apocalyptic number.

266043344404123 is a deficient number, since it is larger than the sum of its proper divisors (46511547530309).

266043344404123 is a wasteful number, since it uses less digits than its factorization.

266043344404123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2817486.

The product of its (nonzero) digits is 3981312, while the sum is 46.

Adding to 266043344404123 its reverse (321404443340662), we get a palindrome (587447787744785).

The spelling of 266043344404123 in words is "two hundred sixty-six trillion, forty-three billion, three hundred forty-four million, four hundred four thousand, one hundred twenty-three".