779668 has 6 divisors (see below), whose sum is σ = 1364426. Its totient is φ = 389832.

The previous prime is 779663. The next prime is 779693. The reversal of 779668 is 866977.

It can be written as a sum of positive squares in only one way, i.e., 753424 + 26244 = 868^2 + 162^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (779663) by changing a digit.

779668 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 as a sum of consecutive naturals, namely, 97455 + ... + 97462.

2⁷⁷⁹⁶⁶⁸ is an apocalyptic number.

It is an amenable number.

779668 is a deficient number, since it is larger than the sum of its proper divisors (584758).

779668 is a wasteful number, since it uses less digits than its factorization.

779668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194921 (or 194919 counting only the distinct ones).

The product of its digits is 127008, while the sum is 43.

The square root of 779668 is about 882.9881086402. The cubic root of 779668 is about 92.0385786534.

The spelling of 779668 in words is "seven hundred seventy-nine thousand, six hundred sixty-eight".