768505866 has 16 divisors (see below), whose sum is σ = 1551935424. Its totient is φ = 253681344.

The previous prime is 768505853. The next prime is 768505889. The reversal of 768505866 is 668505867.

768505866 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 621151 + ... + 622386.

It is an arithmetic number, because the mean of its divisors is an integer number (96995964).

Almost surely, 2^768505866 is an apocalyptic number.

768505866 is an abundant number, since it is smaller than the sum of its proper divisors (783429558).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

768505866 is a wasteful number, since it uses less digits than its factorization.

768505866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1243645.

The product of its (nonzero) digits is 2419200, while the sum is 51.

The square root of 768505866 is about 27721.9383521427. The cubic root of 768505866 is about 915.9724165845.

Subtracting from 768505866 its reverse (668505867), we obtain a palindrome (99999999).

The spelling of 768505866 in words is "seven hundred sixty-eight million, five hundred five thousand, eight hundred sixty-six".