266405248768 has 18 divisors (see below), whose sum is σ = 531769852544. Its totient is φ = 133202624256.

The previous prime is 266405248763. The next prime is 266405248789. The reversal of 266405248768 is 867842504662.

It is a super-2 number, since 2×266405248768² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266405248763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 520322496 + ... + 520323007.

Almost surely, 2^266405248768 is an apocalyptic number.

It is an amenable number.

266405248768 is a deficient number, since it is larger than the sum of its proper divisors (265364603776).

266405248768 is an equidigital number, since it uses as much as digits as its factorization.

266405248768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1040645519 (or 1040645505 counting only the distinct ones).

The product of its (nonzero) digits is 30965760, while the sum is 58.

The spelling of 266405248768 in words is "two hundred sixty-six billion, four hundred five million, two hundred forty-eight thousand, seven hundred sixty-eight".