768665 has 4 divisors (see below), whose sum is σ = 922404. Its totient is φ = 614928.

The previous prime is 768653. The next prime is 768671. The reversal of 768665 is 566867.

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 355216 + 413449 = 596^2 + 643^2 .

It is a cyclic number.

It is not a de Polignac number, because 768665 - 2⁸ = 768409 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76862 + ... + 76871.

It is an arithmetic number, because the mean of its divisors is an integer number (230601).

2⁷⁶⁸⁶⁶⁵ is an apocalyptic number.

It is an amenable number.

768665 is a deficient number, since it is larger than the sum of its proper divisors (153739).

768665 is a wasteful number, since it uses less digits than its factorization.

768665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153738.

The product of its digits is 60480, while the sum is 38.

The square root of 768665 is about 876.7354218919. The cubic root of 768665 is about 91.6035635488.

The spelling of 768665 in words is "seven hundred sixty-eight thousand, six hundred sixty-five".