779966 has 16 divisors (see below), whose sum is σ = 1291248. Its totient is φ = 353320.

The previous prime is 779939. The next prime is 779971. The reversal of 779966 is 669977.

It is a super-2 number, since 2×779966² = 1216693922312, which contains 22 as substring.

It is a Curzon number.

It is a zygodrome in base 10.

It is a congruent number.

It is an unprimeable number.

779966 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2516 + ... + 2808.

It is an arithmetic number, because the mean of its divisors is an integer number (80703).

2⁷⁷⁹⁹⁶⁶ is an apocalyptic number.

779966 is a deficient number, since it is larger than the sum of its proper divisors (511282).

779966 is a wasteful number, since it uses less digits than its factorization.

779966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328 (or 306 counting only the distinct ones).

The product of its digits is 142884, while the sum is 44.

The square root of 779966 is about 883.1568377134. The cubic root of 779966 is about 92.0503033033.

The spelling of 779966 in words is "seven hundred seventy-nine thousand, nine hundred sixty-six".