777776 has 10 divisors (see below), whose sum is σ = 1506972. Its totient is φ = 388880.

The previous prime is 777769. The next prime is 777781. The reversal of 777776 is 677777.

It is a magnanimous number.

It is a nialpdrome in base 10.

It is an unprimeable number.

777776 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, 24290 + ... + 24321.

2⁷⁷⁷⁷⁷⁶ is an apocalyptic number.

It is an amenable number.

777776 is a deficient number, since it is larger than the sum of its proper divisors (729196).

777776 is a wasteful number, since it uses less digits than its factorization.

777776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48619 (or 48613 counting only the distinct ones).

The product of its digits is 100842, while the sum is 41.

The square root of 777776 is about 881.9160957824. The cubic root of 777776 is about 91.9640691447.

Subtracting from 777776 its reverse (677777), we obtain a palindrome (99999).

The spelling of 777776 in words is "seven hundred seventy-seven thousand, seven hundred seventy-six".