126680777 has 2 divisors, whose sum is σ = 126680778. Its totient is φ = 126680776.

The previous prime is 126680767. The next prime is 126680779. The reversal of 126680777 is 777086621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85451536 + 41229241 = 9244^2 + 6421^2 .

It is an emirp because it is prime and its reverse (777086621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 126680777 - 2¹⁶ = 126615241 is a prime.

It is a super-2 number, since 2×126680777² = 32096038522647458, which contains 22 as substring.

Together with 126680779, 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 (126680779) 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, 63340388 + 63340389.

It is an arithmetic number, because the mean of its divisors is an integer number (63340389).

Almost surely, 2^126680777 is an apocalyptic number.

It is an amenable number.

126680777 is a deficient number, since it is larger than the sum of its proper divisors (1).

126680777 is an equidigital number, since it uses as much as digits as its factorization.

126680777 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 197568, while the sum is 44.

The square root of 126680777 is about 11255.2555279745. The cubic root of 126680777 is about 502.2310658828.

The spelling of 126680777 in words is "one hundred twenty-six million, six hundred eighty thousand, seven hundred seventy-seven".