768865665 has 16 divisors (see below), whose sum is σ = 1231200000. Its totient is φ = 409723392.

The previous prime is 768865651. The next prime is 768865697. The reversal of 768865665 is 566568867.

It is not a de Polignac number, because 768865665 - 2¹³ = 768857473 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1785 + ... + 39254.

It is an arithmetic number, because the mean of its divisors is an integer number (76950000).

Almost surely, 2^768865665 is an apocalyptic number.

It is an amenable number.

768865665 is a deficient number, since it is larger than the sum of its proper divisors (462334335).

768865665 is a wasteful number, since it uses less digits than its factorization.

768865665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42296.

The product of its digits is 14515200, while the sum is 57.

The square root of 768865665 is about 27728.4270199375. The cubic root of 768865665 is about 916.1153409071.

The spelling of 768865665 in words is "seven hundred sixty-eight million, eight hundred sixty-five thousand, six hundred sixty-five".