65077777759 has 4 divisors (see below), whose sum is σ = 65158022440. Its totient is φ = 64997533080.

The previous prime is 65077777717. The next prime is 65077777829. The reversal of 65077777759 is 95777777056.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 65077777759 - 2⁷ = 65077777631 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 65077777694 and 65077777703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65077777159) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40121124 + ... + 40122745.

It is an arithmetic number, because the mean of its divisors is an integer number (16289505610).

Almost surely, 2^65077777759 is an apocalyptic number.

65077777759 is a deficient number, since it is larger than the sum of its proper divisors (80244681).

65077777759 is an equidigital number, since it uses as much as digits as its factorization.

65077777759 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80244680.

The product of its (nonzero) digits is 158826150, while the sum is 67.

The spelling of 65077777759 in words is "sixty-five billion, seventy-seven million, seven hundred seventy-seven thousand, seven hundred fifty-nine".