266872218 has 8 divisors (see below), whose sum is σ = 533744448. Its totient is φ = 88957404.

The previous prime is 266872217. The next prime is 266872219. The reversal of 266872218 is 812278662.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (266872217) and next prime (266872219).

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

266872218 is an admirable number.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 266872218.

It is not an unprimeable number, because it can be changed into a prime (266872217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22239346 + ... + 22239357.

It is an arithmetic number, because the mean of its divisors is an integer number (66718056).

Almost surely, 2^266872218 is an apocalyptic number.

266872218 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

266872218 is a wasteful number, since it uses less digits than its factorization.

266872218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44478708.

The product of its digits is 129024, while the sum is 42.

The square root of 266872218 is about 16336.2241047312. The cubic root of 266872218 is about 643.8249286209.

The spelling of 266872218 in words is "two hundred sixty-six million, eight hundred seventy-two thousand, two hundred eighteen".