77752108669 has 2 divisors, whose sum is σ = 77752108670. Its totient is φ = 77752108668.

The previous prime is 77752108559. The next prime is 77752108697. The reversal of 77752108669 is 96680125777.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75275055769 + 2477052900 = 274363^2 + 49770^2 .

It is an emirp because it is prime and its reverse (96680125777) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77752108669 is a prime.

It is a super-2 number, since 2×77752108669² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77752108699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38876054334 + 38876054335.

It is an arithmetic number, because the mean of its divisors is an integer number (38876054335).

Almost surely, 2^77752108669 is an apocalyptic number.

It is an amenable number.

77752108669 is a deficient number, since it is larger than the sum of its proper divisors (1).

77752108669 is an equidigital number, since it uses as much as digits as its factorization.

77752108669 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8890560, while the sum is 58.

The spelling of 77752108669 in words is "seventy-seven billion, seven hundred fifty-two million, one hundred eight thousand, six hundred sixty-nine".