776779977677 has 12 divisors (see below), whose sum is σ = 853839188160. Its totient is φ = 706144445160.

The previous prime is 776779977607. The next prime is 776779977683.

776779977677 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 776779977677 - 2¹⁶ = 776779912141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (776779977607) 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, 6337658 + ... + 6459060.

It is an arithmetic number, because the mean of its divisors is an integer number (71153265680).

Almost surely, 2^776779977677 is an apocalyptic number.

It is an amenable number.

776779977677 is a deficient number, since it is larger than the sum of its proper divisors (77059210483).

776779977677 is a wasteful number, since it uses less digits than its factorization.

776779977677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174304 (or 174293 counting only the distinct ones).

The product of its digits is 16810159716, while the sum is 86.

The spelling of 776779977677 in words is "seven hundred seventy-six billion, seven hundred seventy-nine million, nine hundred seventy-seven thousand, six hundred seventy-seven".