77700007777 has 8 divisors (see below), whose sum is σ = 91862078400. Its totient is φ = 64303454544.

The previous prime is 77700007771. The next prime is 77700007793. The reversal of 77700007777 is 77770000777.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 77700007777 - 2³ = 77700007769 is a prime.

It is a Duffinian number.

77700007777 is a modest number, since divided by 7777 gives 777 as remainder.

It is a zygodrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 77700007777.

It is not an unprimeable number, because it can be changed into a prime (77700007771) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 191379127 + ... + 191379532.

It is an arithmetic number, because the mean of its divisors is an integer number (11482759800).

Almost surely, 2^77700007777 is an apocalyptic number.

It is an amenable number.

77700007777 is a deficient number, since it is larger than the sum of its proper divisors (14162070623).

77700007777 is a wasteful number, since it uses less digits than its factorization.

77700007777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 382758695.

The product of its (nonzero) digits is 823543, while the sum is 49.

It can be divided in two parts, 7770000 and 7777, that added together give a palindrome (7777777).

The spelling of 77700007777 in words is "seventy-seven billion, seven hundred million, seven thousand, seven hundred seventy-seven".