778334825 has 12 divisors (see below), whose sum is σ = 996269568. Its totient is φ = 602581200.

The previous prime is 778334813. The next prime is 778334897. The reversal of 778334825 is 528433877.

778334825 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 778334825 - 2⁶ = 778334761 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 778334825.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 501377 + ... + 502926.

It is an arithmetic number, because the mean of its divisors is an integer number (83022464).

Almost surely, 2^778334825 is an apocalyptic number.

It is an amenable number.

778334825 is a deficient number, since it is larger than the sum of its proper divisors (217934743).

778334825 is a wasteful number, since it uses less digits than its factorization.

778334825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1004344 (or 1004339 counting only the distinct ones).

The product of its digits is 1128960, while the sum is 47.

The square root of 778334825 is about 27898.6527452492. The cubic root of 778334825 is about 919.8608898835.

The spelling of 778334825 in words is "seven hundred seventy-eight million, three hundred thirty-four thousand, eight hundred twenty-five".