777996 has 18 divisors (see below), whose sum is σ = 1966692. Its totient is φ = 259320.

The previous prime is 777989. The next prime is 778013. The reversal of 777996 is 699777.

777996 is nontrivially palindromic in base 5.

It is a tau number, because it is divible by the number of its divisors (18).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10770 + ... + 10841.

2⁷⁷⁷⁹⁹⁶ is an apocalyptic number.

It is an amenable number.

777996 is an abundant number, since it is smaller than the sum of its proper divisors (1188696).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

777996 is a wasteful number, since it uses less digits than its factorization.

777996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21621 (or 21616 counting only the distinct ones).

The product of its digits is 166698, while the sum is 45.

The square root of 777996 is about 882.0408153821. The cubic root of 777996 is about 91.9727392451.

It can be divided in two parts, 7779 and 96, that added together give a triangular number (7875 = T₁₂₅).

The spelling of 777996 in words is "seven hundred seventy-seven thousand, nine hundred ninety-six".