266144223555421 has 8 divisors (see below), whose sum is σ = 268240440351744. Its totient is φ = 264048016024800.

The previous prime is 266144223555401. The next prime is 266144223555503. The reversal of 266144223555421 is 124555322441662.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 266144223555421 - 2⁷ = 266144223555293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266144223555401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62462946 + ... + 66587596.

It is an arithmetic number, because the mean of its divisors is an integer number (33530055043968).

Almost surely, 2^{266144223555421} is an apocalyptic number.

It is an amenable number.

266144223555421 is a deficient number, since it is larger than the sum of its proper divisors (2096216796323).

266144223555421 is a wasteful number, since it uses less digits than its factorization.

266144223555421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4632851.

The product of its digits is 13824000, while the sum is 52.

The spelling of 266144223555421 in words is "two hundred sixty-six trillion, one hundred forty-four billion, two hundred twenty-three million, five hundred fifty-five thousand, four hundred twenty-one".