799806665 has 72 divisors (see below), whose sum is σ = 1195413120. Its totient is φ = 511842240.

The previous prime is 799806659. The next prime is 799806673. The reversal of 799806665 is 566608997.

799806665 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 799806665 - 2⁴ = 799806649 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 799806665.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 10124096 + ... + 10124174.

It is an arithmetic number, because the mean of its divisors is an integer number (16602960).

Almost surely, 2^799806665 is an apocalyptic number.

It is an amenable number.

799806665 is a deficient number, since it is larger than the sum of its proper divisors (395606455).

799806665 is a wasteful number, since it uses less digits than its factorization.

799806665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203 (or 165 counting only the distinct ones).

The product of its (nonzero) digits is 4898880, while the sum is 56.

The square root of 799806665 is about 28280.8533287099. The cubic root of 799806665 is about 928.2429788995.

The spelling of 799806665 in words is "seven hundred ninety-nine million, eight hundred six thousand, six hundred sixty-five".