804666020 has 12 divisors (see below), whose sum is σ = 1689798684. Its totient is φ = 321866400.

The previous prime is 804666011. The next prime is 804666043. The reversal of 804666020 is 20666408.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 326019136 + 478646884 = 18056^2 + 21878^2 .

It is a super-3 number, since 3×804666020³ (a number of 28 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20116631 + ... + 20116670.

It is an arithmetic number, because the mean of its divisors is an integer number (140816557).

Almost surely, 2^804666020 is an apocalyptic number.

It is an amenable number.

804666020 is an abundant number, since it is smaller than the sum of its proper divisors (885132664).

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

804666020 is a wasteful number, since it uses less digits than its factorization.

804666020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40233310 (or 40233308 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 804666020 is about 28366.6356834927. The cubic root of 804666020 is about 930.1190813717.

The spelling of 804666020 in words is "eight hundred four million, six hundred sixty-six thousand, twenty".