268836566 has 4 divisors (see below), whose sum is σ = 403254852. Its totient is φ = 134418282.

The previous prime is 268836563. The next prime is 268836571. The reversal of 268836566 is 665638862.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (268836563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67209140 + ... + 67209143.

It is an arithmetic number, because the mean of its divisors is an integer number (100813713).

Almost surely, 2^268836566 is an apocalyptic number.

268836566 is a deficient number, since it is larger than the sum of its proper divisors (134418286).

268836566 is a wasteful number, since it uses less digits than its factorization.

268836566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134418285.

The product of its digits is 2488320, while the sum is 50.

The square root of 268836566 is about 16396.2363364279. The cubic root of 268836566 is about 645.4007212853.

The spelling of 268836566 in words is "two hundred sixty-eight million, eight hundred thirty-six thousand, five hundred sixty-six".