268666861 has 8 divisors (see below), whose sum is σ = 285557184. Its totient is φ = 251897280.

The previous prime is 268666837. The next prime is 268666877. The reversal of 268666861 is 168666862.

It is a happy number.

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 268666861 - 2⁵ = 268666829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (268666261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25575 + ... + 34516.

It is an arithmetic number, because the mean of its divisors is an integer number (35694648).

Almost surely, 2^268666861 is an apocalyptic number.

It is an amenable number.

268666861 is a deficient number, since it is larger than the sum of its proper divisors (16890323).

268666861 is a wasteful number, since it uses less digits than its factorization.

268666861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60371.

The product of its digits is 995328, while the sum is 49.

The square root of 268666861 is about 16391.0603988882. The cubic root of 268666861 is about 645.2648880963.

Subtracting from 268666861 its reverse (168666862), we obtain a palindrome (99999999).

The spelling of 268666861 in words is "two hundred sixty-eight million, six hundred sixty-six thousand, eight hundred sixty-one".