266821234 has 8 divisors (see below), whose sum is σ = 400302000. Its totient is φ = 133387236.

The previous prime is 266821223. The next prime is 266821249. The reversal of 266821234 is 432128662.

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

It is a self number, because there is not a number n which added to its sum of digits gives 266821234.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13017 + ... + 26515.

It is an arithmetic number, because the mean of its divisors is an integer number (50037750).

Almost surely, 2^266821234 is an apocalyptic number.

266821234 is a deficient number, since it is larger than the sum of its proper divisors (133480766).

266821234 is a wasteful number, since it uses less digits than its factorization.

266821234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23384.

The product of its digits is 27648, while the sum is 34.

The square root of 266821234 is about 16334.6635716809. The cubic root of 266821234 is about 643.7839266501.

Adding to 266821234 its reverse (432128662), we get a palindrome (698949896).

The spelling of 266821234 in words is "two hundred sixty-six million, eight hundred twenty-one thousand, two hundred thirty-four".