266643344161 has 8 divisors (see below), whose sum is σ = 280683226880. Its totient is φ = 252604063728.

The previous prime is 266643344089. The next prime is 266643344173. The reversal of 266643344161 is 161443346662.

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 266643344161 - 2¹¹ = 266643342113 is a prime.

It is a super-2 number, since 2×266643344161² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (266643744161) 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, 973360 + ... + 1216846.

It is an arithmetic number, because the mean of its divisors is an integer number (35085403360).

Almost surely, 2^266643344161 is an apocalyptic number.

It is an amenable number.

266643344161 is a deficient number, since it is larger than the sum of its proper divisors (14039882719).

266643344161 is a wasteful number, since it uses less digits than its factorization.

266643344161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301143.

The product of its digits is 1492992, while the sum is 46.

The spelling of 266643344161 in words is "two hundred sixty-six billion, six hundred forty-three million, three hundred forty-four thousand, one hundred sixty-one".