766385 has 4 divisors (see below), whose sum is σ = 919668. Its totient is φ = 613104.

The previous prime is 766373. The next prime is 766387. The reversal of 766385 is 583667.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 351649 + 414736 = 593^2 + 644^2 .

It is a cyclic number.

It is not a de Polignac number, because 766385 - 2⁴ = 766369 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 766385.

It is not an unprimeable number, because it can be changed into a prime (766387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76634 + ... + 76643.

It is an arithmetic number, because the mean of its divisors is an integer number (229917).

2⁷⁶⁶³⁸⁵ is an apocalyptic number.

It is an amenable number.

766385 is a deficient number, since it is larger than the sum of its proper divisors (153283).

766385 is a wasteful number, since it uses less digits than its factorization.

766385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153282.

The product of its digits is 30240, while the sum is 35.

The square root of 766385 is about 875.4341779940. The cubic root of 766385 is about 91.5129029153.

The spelling of 766385 in words is "seven hundred sixty-six thousand, three hundred eighty-five".