769665 has 16 divisors (see below), whose sum is σ = 1326528. Its totient is φ = 378816.

The previous prime is 769663. The next prime is 769673. The reversal of 769665 is 566967.

It is a happy number.

It is not a de Polignac number, because 769665 - 2¹ = 769663 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (769661) 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 15 ways as a sum of consecutive naturals, for example, 1779 + ... + 2168.

It is an arithmetic number, because the mean of its divisors is an integer number (82908).

2⁷⁶⁹⁶⁶⁵ is an apocalyptic number.

It is an amenable number.

769665 is a deficient number, since it is larger than the sum of its proper divisors (556863).

769665 is a wasteful number, since it uses less digits than its factorization.

769665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3968.

The product of its digits is 68040, while the sum is 39.

The square root of 769665 is about 877.3055340074. The cubic root of 769665 is about 91.6432704294.

The spelling of 769665 in words is "seven hundred sixty-nine thousand, six hundred sixty-five".