804221666 has 8 divisors (see below), whose sum is σ = 1208790864. Its totient is φ = 401291380.

The previous prime is 804221599. The next prime is 804221681. The reversal of 804221666 is 666122408.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 408500 + ... + 410463.

It is an arithmetic number, because the mean of its divisors is an integer number (151098858).

Almost surely, 2^804221666 is an apocalyptic number.

804221666 is a deficient number, since it is larger than the sum of its proper divisors (404569198).

804221666 is a wasteful number, since it uses less digits than its factorization.

804221666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 819456.

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 804221666 is about 28358.8022666685. The cubic root of 804221666 is about 929.9478392143.

The spelling of 804221666 in words is "eight hundred four million, two hundred twenty-one thousand, six hundred sixty-six".