77700007769 has 2 divisors, whose sum is σ = 77700007770. Its totient is φ = 77700007768.

The previous prime is 77700007709. The next prime is 77700007771. The reversal of 77700007769 is 96770000777.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75507895369 + 2192112400 = 274787^2 + 46820^2 .

It is a cyclic number.

It is not a de Polignac number, because 77700007769 - 2¹⁶ = 77699942233 is a prime.

It is a super-3 number, since 3×77700007769³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

Together with 77700007771, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (77700007709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38850003884 + 38850003885.

It is an arithmetic number, because the mean of its divisors is an integer number (38850003885).

Almost surely, 2^77700007769 is an apocalyptic number.

It is an amenable number.

77700007769 is a deficient number, since it is larger than the sum of its proper divisors (1).

77700007769 is an equidigital number, since it uses as much as digits as its factorization.

77700007769 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 907578, while the sum is 50.

The spelling of 77700007769 in words is "seventy-seven billion, seven hundred million, seven thousand, seven hundred sixty-nine".