266780247 has 8 divisors (see below), whose sum is σ = 355814256. Its totient is φ = 177799872.

The previous prime is 266780219. The next prime is 266780257. The reversal of 266780247 is 742087662.

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

It is not a de Polignac number, because 266780247 - 2¹⁰ = 266779223 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 266780199 and 266780208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266780207) 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, 163 + ... + 23099.

It is an arithmetic number, because the mean of its divisors is an integer number (44476782).

Almost surely, 2^266780247 is an apocalyptic number.

266780247 is a deficient number, since it is larger than the sum of its proper divisors (89034009).

266780247 is a wasteful number, since it uses less digits than its factorization.

266780247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26817.

The product of its (nonzero) digits is 225792, while the sum is 42.

The square root of 266780247 is about 16333.4089215938. The cubic root of 266780247 is about 643.7509606043.

It can be divided in two parts, 266 and 780247, that multiplied together give a palindrome (207545702).

The spelling of 266780247 in words is "two hundred sixty-six million, seven hundred eighty thousand, two hundred forty-seven".