77777007705 has 32 divisors (see below), whose sum is σ = 138291676800. Its totient is φ = 41474638656.

The previous prime is 77777007691. The next prime is 77777007733. The reversal of 77777007705 is 50770077777.

It is a happy number.

It is not a de Polignac number, because 77777007705 - 2⁵ = 77777007673 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 903426 + ... + 985764.

It is an arithmetic number, because the mean of its divisors is an integer number (4321614900).

Almost surely, 2^77777007705 is an apocalyptic number.

It is an amenable number.

77777007705 is a deficient number, since it is larger than the sum of its proper divisors (60514669095).

77777007705 is a wasteful number, since it uses less digits than its factorization.

77777007705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89350 (or 89344 counting only the distinct ones).

The product of its (nonzero) digits is 4117715, while the sum is 54.

The spelling of 77777007705 in words is "seventy-seven billion, seven hundred seventy-seven million, seven thousand, seven hundred five".