266537133117 has 8 divisors (see below), whose sum is σ = 394869826880. Its totient is φ = 177691422060.

The previous prime is 266537133061. The next prime is 266537133131. The reversal of 266537133117 is 711331735662.

266537133117 is a `hidden beast` number, since 2 + 66 + 537 + 13 + 31 + 17 = 666.

It is not a de Polignac number, because 266537133117 - 2⁶ = 266537133053 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 (266537133157) 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, 4935872809 + ... + 4935872862.

It is an arithmetic number, because the mean of its divisors is an integer number (49358728360).

Almost surely, 2^266537133117 is an apocalyptic number.

266537133117 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

266537133117 is a deficient number, since it is larger than the sum of its proper divisors (128332693763).

266537133117 is an equidigital number, since it uses as much as digits as its factorization.

266537133117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9871745680 (or 9871745674 counting only the distinct ones).

The product of its digits is 476280, while the sum is 45.

Adding to 266537133117 its reverse (711331735662), we get a palindrome (977868868779).

The spelling of 266537133117 in words is "two hundred sixty-six billion, five hundred thirty-seven million, one hundred thirty-three thousand, one hundred seventeen".