68266399 has 4 divisors (see below), whose sum is σ = 68317920. Its totient is φ = 68214880.

The previous prime is 68266397. The next prime is 68266403. The reversal of 68266399 is 99366286.

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 68266399 - 2¹ = 68266397 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 (68266397) 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 3 ways as a sum of consecutive naturals, for example, 23719 + ... + 26440.

It is an arithmetic number, because the mean of its divisors is an integer number (17079480).

Almost surely, 2^68266399 is an apocalyptic number.

68266399 is a deficient number, since it is larger than the sum of its proper divisors (51521).

68266399 is a wasteful number, since it uses less digits than its factorization.

68266399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51520.

The product of its digits is 839808, while the sum is 49.

The square root of 68266399 is about 8262.3482739473. The cubic root of 68266399 is about 408.6978297876.

It can be divided in two parts, 6826 and 6399, that added together give a square (13225 = 115²).

The spelling of 68266399 in words is "sixty-eight million, two hundred sixty-six thousand, three hundred ninety-nine".