780774668 has 6 divisors (see below), whose sum is σ = 1366355676. Its totient is φ = 390387332.

The previous prime is 780774647. The next prime is 780774677. The reversal of 780774668 is 866477087.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97596830 + ... + 97596837.

It is an arithmetic number, because the mean of its divisors is an integer number (227725946).

Almost surely, 2^780774668 is an apocalyptic number.

It is an amenable number.

780774668 is a deficient number, since it is larger than the sum of its proper divisors (585581008).

780774668 is a wasteful number, since it uses less digits than its factorization.

780774668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195193671 (or 195193669 counting only the distinct ones).

The product of its (nonzero) digits is 3161088, while the sum is 53.

The square root of 780774668 is about 27942.3454276838. The cubic root of 780774668 is about 920.8210487053.

The spelling of 780774668 in words is "seven hundred eighty million, seven hundred seventy-four thousand, six hundred sixty-eight".