779238666 has 48 divisors (see below), whose sum is σ = 1771660800. Its totient is φ = 247056480.

The previous prime is 779238653. The next prime is 779238679. The reversal of 779238666 is 666832977.

779238666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (779238653) and next prime (779238679).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 69735 + ... + 80133.

It is an arithmetic number, because the mean of its divisors is an integer number (36909600).

Almost surely, 2^779238666 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 779238666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (885830400).

779238666 is an abundant number, since it is smaller than the sum of its proper divisors (992422134).

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

779238666 is a wasteful number, since it uses less digits than its factorization.

779238666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10611 (or 10608 counting only the distinct ones).

The product of its digits is 4572288, while the sum is 54.

The square root of 779238666 is about 27914.8466949041. The cubic root of 779238666 is about 920.2168148416.

The spelling of 779238666 in words is "seven hundred seventy-nine million, two hundred thirty-eight thousand, six hundred sixty-six".