266796734221 has 8 divisors (see below), whose sum is σ = 266968782944. Its totient is φ = 266624738640.

The previous prime is 266796734219. The next prime is 266796734227. The reversal of 266796734221 is 122437697662.

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 266796734221 - 2¹ = 266796734219 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 (266796734227) 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, 15058450 + ... + 15076156.

It is an arithmetic number, because the mean of its divisors is an integer number (33371097868).

Almost surely, 2^266796734221 is an apocalyptic number.

It is an amenable number.

266796734221 is a deficient number, since it is larger than the sum of its proper divisors (172048723).

266796734221 is a wasteful number, since it uses less digits than its factorization.

266796734221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26571.

The product of its digits is 9144576, while the sum is 55.

The spelling of 266796734221 in words is "two hundred sixty-six billion, seven hundred ninety-six million, seven hundred thirty-four thousand, two hundred twenty-one".