378566766 has 12 divisors (see below), whose sum is σ = 820228032. Its totient is φ = 126188916.

The previous prime is 378566753. The next prime is 378566777. The reversal of 378566766 is 667665873.

378566766 is a `hidden beast` number, since 3 + 7 + 8 + 566 + 76 + 6 = 666.

378566766 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10515726 + ... + 10515761.

It is an arithmetic number, because the mean of its divisors is an integer number (68352336).

Almost surely, 2^378566766 is an apocalyptic number.

378566766 is an abundant number, since it is smaller than the sum of its proper divisors (441661266).

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

378566766 is a wasteful number, since it uses less digits than its factorization.

378566766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21031495 (or 21031492 counting only the distinct ones).

The product of its digits is 7620480, while the sum is 54.

The square root of 378566766 is about 19456.7922844440. The cubic root of 378566766 is about 723.4038709317.

The spelling of 378566766 in words is "three hundred seventy-eight million, five hundred sixty-six thousand, seven hundred sixty-six".