77777340767 has 16 divisors (see below), whose sum is σ = 92838097920. Its totient is φ = 63765089568.

The previous prime is 77777340749. The next prime is 77777340791. The reversal of 77777340767 is 76704377777.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 77777340767 - 2⁶ = 77777340703 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 (77777340737) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2529623 + ... + 2560184.

It is an arithmetic number, because the mean of its divisors is an integer number (5802381120).

Almost surely, 2^77777340767 is an apocalyptic number.

77777340767 is a deficient number, since it is larger than the sum of its proper divisors (15060757153).

77777340767 is a wasteful number, since it uses less digits than its factorization.

77777340767 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5089910.

The product of its (nonzero) digits is 59295096, while the sum is 62.

The spelling of 77777340767 in words is "seventy-seven billion, seven hundred seventy-seven million, three hundred forty thousand, seven hundred sixty-seven".