268381666667 has 4 divisors (see below), whose sum is σ = 268863501456. Its totient is φ = 267899831880.

The previous prime is 268381666621. The next prime is 268381666711. The reversal of 268381666667 is 766666183862.

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

It is a cyclic number.

It is not a de Polignac number, because 268381666667 - 2¹⁸ = 268381404523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (268381666607) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 240916559 + ... + 240917672.

It is an arithmetic number, because the mean of its divisors is an integer number (67215875364).

Almost surely, 2^268381666667 is an apocalyptic number.

268381666667 is a deficient number, since it is larger than the sum of its proper divisors (481834789).

268381666667 is an equidigital number, since it uses as much as digits as its factorization.

268381666667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 481834788.

The product of its digits is 125411328, while the sum is 65.

The spelling of 268381666667 in words is "two hundred sixty-eight billion, three hundred eighty-one million, six hundred sixty-six thousand, six hundred sixty-seven".