266856913 has 8 divisors (see below), whose sum is σ = 278162432. Its totient is φ = 255766896.

The previous prime is 266856911. The next prime is 266856923. The reversal of 266856913 is 319658662.

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

It is a cyclic number.

It is not a de Polignac number, because 266856913 - 2¹ = 266856911 is a prime.

It is a super-4 number, since 4×266856913⁴ (a number of 35 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (266856911) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 51345 + ... + 56302.

It is an arithmetic number, because the mean of its divisors is an integer number (34770304).

Almost surely, 2^266856913 is an apocalyptic number.

It is an amenable number.

266856913 is a deficient number, since it is larger than the sum of its proper divisors (11305519).

266856913 is a wasteful number, since it uses less digits than its factorization.

266856913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107751.

The product of its digits is 466560, while the sum is 46.

The square root of 266856913 is about 16335.7556605135. The cubic root of 266856913 is about 643.8126206970.

The spelling of 266856913 in words is "two hundred sixty-six million, eight hundred fifty-six thousand, nine hundred thirteen".