4000666804 has 6 divisors (see below), whose sum is σ = 7001166914. Its totient is φ = 2000333400.

The previous prime is 4000666793. The next prime is 4000666823. The reversal of 4000666804 is 4086660004.

It can be written as a sum of positive squares in only one way, i.e., 3861379600 + 139287204 = 62140^2 + 11802^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 4000666804.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500083347 + ... + 500083354.

Almost surely, 2^4000666804 is an apocalyptic number.

It is an amenable number.

4000666804 is a deficient number, since it is larger than the sum of its proper divisors (3000500110).

4000666804 is a wasteful number, since it uses less digits than its factorization.

4000666804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1000166705 (or 1000166703 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 34.

The square root of 4000666804 is about 63250.8245321751. The cubic root of 4000666804 is about 1587.4892541815.

The spelling of 4000666804 in words is "four billion, six hundred sixty-six thousand, eight hundred four".