765666005 has 16 divisors (see below), whose sum is σ = 990966144. Its totient is φ = 564563520.

The previous prime is 765666001. The next prime is 765666023. The reversal of 765666005 is 500666567.

765666005 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 765666005 - 2² = 765666001 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 (765666001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36392 + ... + 53438.

It is an arithmetic number, because the mean of its divisors is an integer number (61935384).

Almost surely, 2^765666005 is an apocalyptic number.

It is an amenable number.

765666005 is a deficient number, since it is larger than the sum of its proper divisors (225300139).

765666005 is a wasteful number, since it uses less digits than its factorization.

765666005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17756.

The product of its (nonzero) digits is 226800, while the sum is 41.

The square root of 765666005 is about 27670.6704833837. The cubic root of 765666005 is about 914.8427591685.

The spelling of 765666005 in words is "seven hundred sixty-five million, six hundred sixty-six thousand, five".