861066804 has 24 divisors (see below), whose sum is σ = 2163706720. Its totient is φ = 264943584.

The previous prime is 861066803. The next prime is 861066809. The reversal of 861066804 is 408660168.

861066804 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (861066803) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2759674 + ... + 2759985.

Almost surely, 2^861066804 is an apocalyptic number.

It is an amenable number.

861066804 is an abundant number, since it is smaller than the sum of its proper divisors (1302639916).

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

861066804 is a wasteful number, since it uses less digits than its factorization.

861066804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5519679 (or 5519677 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 39.

The square root of 861066804 is about 29343.9398172774. The cubic root of 861066804 is about 951.3615947354.

The spelling of 861066804 in words is "eight hundred sixty-one million, sixty-six thousand, eight hundred four".