76778776337 has 2 divisors, whose sum is σ = 76778776338. Its totient is φ = 76778776336.

The previous prime is 76778776309. The next prime is 76778776363. The reversal of 76778776337 is 73367787767.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66115322641 + 10663453696 = 257129^2 + 103264^2 .

It is a cyclic number.

It is not a de Polignac number, because 76778776337 - 2¹⁰ = 76778775313 is a prime.

It is a super-2 number, since 2×76778776337² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (76778776367) 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, 38389388168 + 38389388169.

It is an arithmetic number, because the mean of its divisors is an integer number (38389388169).

Almost surely, 2^76778776337 is an apocalyptic number.

It is an amenable number.

76778776337 is a deficient number, since it is larger than the sum of its proper divisors (1).

76778776337 is an equidigital number, since it uses as much as digits as its factorization.

76778776337 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 304946208, while the sum is 68.

The spelling of 76778776337 in words is "seventy-six billion, seven hundred seventy-eight million, seven hundred seventy-six thousand, three hundred thirty-seven".