7700777700077 has 64 divisors (see below), whose sum is σ = 9847521216000. Its totient is φ = 5969651466240.

The previous prime is 7700777700071. The next prime is 7700777700079. The reversal of 7700777700077 is 7700077770077.

It is a happy number.

It is not a de Polignac number, because 7700777700077 - 2⁶ = 7700777700013 is a prime.

It is a Duffinian number.

It is a zygodrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 7700777699995 and 7700777700031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7700777700071) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1238661473 + ... + 1238667689.

It is an arithmetic number, because the mean of its divisors is an integer number (153867519000).

Almost surely, 2^{7700777700077} is an apocalyptic number.

7700777700077 is a gapful number since it is divisible by the number (77) formed by its first and last digit.

It is an amenable number.

7700777700077 is a deficient number, since it is larger than the sum of its proper divisors (2146743515923).

7700777700077 is a wasteful number, since it uses less digits than its factorization.

7700777700077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7891 (or 7877 counting only the distinct ones).

The product of its (nonzero) digits is 5764801, while the sum is 56.

It can be divided in two parts, 7700 and 777700077, that added together give a palindrome (777707777).

The spelling of 7700777700077 in words is "seven trillion, seven hundred billion, seven hundred seventy-seven million, seven hundred thousand, seventy-seven".