779116778 has 16 divisors (see below), whose sum is σ = 1278405504. Its totient is φ = 353175360.

The previous prime is 779116759. The next prime is 779116781. The reversal of 779116778 is 877611977.

It is a happy number.

It is a super-2 number, since 2×779116778² = 1214045907522202568, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40175 + ... + 56322.

It is an arithmetic number, because the mean of its divisors is an integer number (79900344).

Almost surely, 2^779116778 is an apocalyptic number.

779116778 is a deficient number, since it is larger than the sum of its proper divisors (499288726).

779116778 is a wasteful number, since it uses less digits than its factorization.

779116778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96877.

The product of its digits is 1037232, while the sum is 53.

The square root of 779116778 is about 27912.6633985365. The cubic root of 779116778 is about 920.1688324366.

The spelling of 779116778 in words is "seven hundred seventy-nine million, one hundred sixteen thousand, seven hundred seventy-eight".