778116701 has 2 divisors, whose sum is σ = 778116702. Its totient is φ = 778116700.

The previous prime is 778116683. The next prime is 778116739. The reversal of 778116701 is 107611877.

It is an a-pointer prime, because the next prime (778116739) can be obtained adding 778116701 to its sum of digits (38).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 391011076 + 387105625 = 19774^2 + 19675^2 .

It is a cyclic number.

It is not a de Polignac number, because 778116701 - 2¹⁰ = 778115677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (778116751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 389058350 + 389058351.

It is an arithmetic number, because the mean of its divisors is an integer number (389058351).

Almost surely, 2^778116701 is an apocalyptic number.

It is an amenable number.

778116701 is a deficient number, since it is larger than the sum of its proper divisors (1).

778116701 is an equidigital number, since it uses as much as digits as its factorization.

778116701 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16464, while the sum is 38.

The square root of 778116701 is about 27894.7432502972. The cubic root of 778116701 is about 919.7749532248.

The spelling of 778116701 in words is "seven hundred seventy-eight million, one hundred sixteen thousand, seven hundred one".