266163404421 has 8 divisors (see below), whose sum is σ = 356723320000. Its totient is φ = 176522879232.

The previous prime is 266163404417. The next prime is 266163404443. The reversal of 266163404421 is 124404361662.

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

It is not a de Polignac number, because 266163404421 - 2² = 266163404417 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 266163404421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266163424421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 229846921 + ... + 229848078.

It is an arithmetic number, because the mean of its divisors is an integer number (44590415000).

Almost surely, 2^266163404421 is an apocalyptic number.

It is an amenable number.

266163404421 is a deficient number, since it is larger than the sum of its proper divisors (90559915579).

266163404421 is a wasteful number, since it uses less digits than its factorization.

266163404421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 459695195.

The product of its (nonzero) digits is 165888, while the sum is 39.

The spelling of 266163404421 in words is "two hundred sixty-six billion, one hundred sixty-three million, four hundred four thousand, four hundred twenty-one".