266878213 has 8 divisors (see below), whose sum is σ = 315521280. Its totient is φ = 220864560.

The previous prime is 266878187. The next prime is 266878231. The reversal of 266878213 is 312878662.

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

It is not a de Polignac number, because 266878213 - 2¹⁷ = 266747141 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 266878213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266878273) 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, 657133 + ... + 657538.

It is an arithmetic number, because the mean of its divisors is an integer number (39440160).

Almost surely, 2^266878213 is an apocalyptic number.

It is an amenable number.

266878213 is a deficient number, since it is larger than the sum of its proper divisors (48643067).

266878213 is a wasteful number, since it uses less digits than its factorization.

266878213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1314707.

The product of its digits is 193536, while the sum is 43.

The square root of 266878213 is about 16336.4075916341. The cubic root of 266878213 is about 643.8297495318.

The spelling of 266878213 in words is "two hundred sixty-six million, eight hundred seventy-eight thousand, two hundred thirteen".