777116681 has 12 divisors (see below), whose sum is σ = 853317360. Its totient is φ = 701871480.

The previous prime is 777116657. The next prime is 777116749. The reversal of 777116681 is 186611777.

It is not a de Polignac number, because 777116681 - 2¹⁴ = 777100297 is a prime.

It is a super-2 number, since 2×777116681² = 1207820671776911522, which contains 22 as substring.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (777116981) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 290930 + ... + 293588.

It is an arithmetic number, because the mean of its divisors is an integer number (71109780).

Almost surely, 2^777116681 is an apocalyptic number.

It is an amenable number.

777116681 is a deficient number, since it is larger than the sum of its proper divisors (76200679).

777116681 is a wasteful number, since it uses less digits than its factorization.

777116681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2996 (or 2833 counting only the distinct ones).

The product of its digits is 98784, while the sum is 44.

The square root of 777116681 is about 27876.8126047437. The cubic root of 777116681 is about 919.3807588567.

The spelling of 777116681 in words is "seven hundred seventy-seven million, one hundred sixteen thousand, six hundred eighty-one".