765640207 has 6 divisors (see below), whose sum is σ = 808058328. Its totient is φ = 725343012.

The previous prime is 765640193. The next prime is 765640231. The reversal of 765640207 is 702046567.

It is not a de Polignac number, because 765640207 - 2⁷ = 765640079 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 (765640247) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 1060083 + ... + 1060804.

It is an arithmetic number, because the mean of its divisors is an integer number (134676388).

Almost surely, 2^765640207 is an apocalyptic number.

765640207 is a deficient number, since it is larger than the sum of its proper divisors (42418121).

765640207 is a wasteful number, since it uses less digits than its factorization.

765640207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2120925 (or 2120906 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 37.

The square root of 765640207 is about 27670.2043180024. The cubic root of 765640207 is about 914.8324842887.

The spelling of 765640207 in words is "seven hundred sixty-five million, six hundred forty thousand, two hundred seven".