769661 has 2 divisors, whose sum is σ = 769662. Its totient is φ = 769660.

The previous prime is 769627. The next prime is 769663. The reversal of 769661 is 166967.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 525625 + 244036 = 725^2 + 494^2 .

It is an emirp because it is prime and its reverse (166967) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 769661 - 2⁶ = 769597 is a prime.

Together with 769663, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 769661.

It is not a weakly prime, because it can be changed into another prime (769663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 384830 + 384831.

It is an arithmetic number, because the mean of its divisors is an integer number (384831).

2⁷⁶⁹⁶⁶¹ is an apocalyptic number.

It is an amenable number.

769661 is a deficient number, since it is larger than the sum of its proper divisors (1).

769661 is an equidigital number, since it uses as much as digits as its factorization.

769661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13608, while the sum is 35.

The square root of 769661 is about 877.3032542969. The cubic root of 769661 is about 91.6431116704.

It can be divided in two parts, 76966 and 1, that added together give a palindrome (76967).

The spelling of 769661 in words is "seven hundred sixty-nine thousand, six hundred sixty-one".