77777693077 has 4 divisors (see below), whose sum is σ = 88888792096. Its totient is φ = 66666594060.

The previous prime is 77777693041. The next prime is 77777693087. The reversal of 77777693077 is 77039677777.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 77777693077 - 2¹⁵ = 77777660309 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 (77777693017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5555549499 + ... + 5555549512.

It is an arithmetic number, because the mean of its divisors is an integer number (22222198024).

Almost surely, 2^77777693077 is an apocalyptic number.

It is an amenable number.

77777693077 is a deficient number, since it is larger than the sum of its proper divisors (11111099019).

77777693077 is a wasteful number, since it uses less digits than its factorization.

77777693077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11111099018.

The product of its (nonzero) digits is 133413966, while the sum is 67.

The spelling of 77777693077 in words is "seventy-seven billion, seven hundred seventy-seven million, six hundred ninety-three thousand, seventy-seven".