4080809866 has 12 divisors (see below), whose sum is σ = 7120596978. Its totient is φ = 1748918472.

The previous prime is 4080809767. The next prime is 4080809879. The reversal of 4080809866 is 6689080804.

It can be written as a sum of positive squares in only one way, i.e., 3840404841 + 240405025 = 61971^2 + 15505^2 .

It is a Harshad number since it is a multiple of its sum of digits (49).

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, 20820361 + ... + 20820556.

Almost surely, 2^4080809866 is an apocalyptic number.

4080809866 is a deficient number, since it is larger than the sum of its proper divisors (3039787112).

4080809866 is a wasteful number, since it uses less digits than its factorization.

4080809866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41640933 (or 41640926 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 49.

The square root of 4080809866 is about 63881.2168481472. The cubic root of 4080809866 is about 1598.0196679080.

The spelling of 4080809866 in words is "four billion, eighty million, eight hundred nine thousand, eight hundred sixty-six".