773666749 has 2 divisors, whose sum is σ = 773666750. Its totient is φ = 773666748.

The previous prime is 773666731. The next prime is 773666759. The reversal of 773666749 is 947666377.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 750212100 + 23454649 = 27390^2 + 4843^2 .

It is a cyclic number.

It is not a de Polignac number, because 773666749 - 2⁵ = 773666717 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 773666749.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (773666759) 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, 386833374 + 386833375.

It is an arithmetic number, because the mean of its divisors is an integer number (386833375).

Almost surely, 2^773666749 is an apocalyptic number.

It is an amenable number.

773666749 is a deficient number, since it is larger than the sum of its proper divisors (1).

773666749 is an equidigital number, since it uses as much as digits as its factorization.

773666749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8001504, while the sum is 55.

The square root of 773666749 is about 27814.8656117552. The cubic root of 773666749 is about 918.0182408806.

The spelling of 773666749 in words is "seven hundred seventy-three million, six hundred sixty-six thousand, seven hundred forty-nine".