765664328247407 has 2 divisors, whose sum is σ = 765664328247408. Its totient is φ = 765664328247406.

The previous prime is 765664328247373. The next prime is 765664328247431. The reversal of 765664328247407 is 704742823466567.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (704742823466567) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 765664328247407 - 2⁴⁰ = 764564816619631 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (765664328247107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 382832164123703 + 382832164123704.

It is an arithmetic number, because the mean of its divisors is an integer number (382832164123704).

Almost surely, 2^{765664328247407} is an apocalyptic number.

765664328247407 is a deficient number, since it is larger than the sum of its proper divisors (1).

765664328247407 is an equidigital number, since it uses as much as digits as its factorization.

765664328247407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2275983360, while the sum is 71.

The spelling of 765664328247407 in words is "seven hundred sixty-five trillion, six hundred sixty-four billion, three hundred twenty-eight million, two hundred forty-seven thousand, four hundred seven".