76687720757 has 2 divisors, whose sum is σ = 76687720758. Its totient is φ = 76687720756.

The previous prime is 76687720741. The next prime is 76687720841. The reversal of 76687720757 is 75702778667.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73954626916 + 2733093841 = 271946^2 + 52279^2 .

It is an emirp because it is prime and its reverse (75702778667) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 76687720757 - 2⁴ = 76687720741 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 76687720757.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (76687720457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38343860378 + 38343860379.

It is an arithmetic number, because the mean of its divisors is an integer number (38343860379).

Almost surely, 2^76687720757 is an apocalyptic number.

It is an amenable number.

76687720757 is a deficient number, since it is larger than the sum of its proper divisors (1).

76687720757 is an equidigital number, since it uses as much as digits as its factorization.

76687720757 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48404160, while the sum is 62.

The spelling of 76687720757 in words is "seventy-six billion, six hundred eighty-seven million, seven hundred twenty thousand, seven hundred fifty-seven".