778036668 has 48 divisors (see below), whose sum is σ = 1867219200. Its totient is φ = 252008064.

The previous prime is 778036657. The next prime is 778036669. The reversal of 778036668 is 866630877.

It is a self number, because there is not a number n which added to its sum of digits gives 778036668.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (778036669) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 98896 + ... + 106472.

It is an arithmetic number, because the mean of its divisors is an integer number (38900400).

Almost surely, 2^778036668 is an apocalyptic number.

It is an amenable number.

778036668 is an abundant number, since it is smaller than the sum of its proper divisors (1089182532).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

778036668 is a wasteful number, since it uses less digits than its factorization.

778036668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7826 (or 7824 counting only the distinct ones).

The product of its (nonzero) digits is 2032128, while the sum is 51.

The square root of 778036668 is about 27893.3086599636. The cubic root of 778036668 is about 919.7434177354.

The spelling of 778036668 in words is "seven hundred seventy-eight million, thirty-six thousand, six hundred sixty-eight".