799580665 has 16 divisors (see below), whose sum is σ = 1038674448. Its totient is φ = 587390976.

The previous prime is 799580659. The next prime is 799580687. The reversal of 799580665 is 566085997.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 395731449 + 403849216 = 19893^2 + 20096^2 .

It is a cyclic number.

It is not a de Polignac number, because 799580665 - 2¹⁵ = 799547897 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19324 + ... + 44413.

It is an arithmetic number, because the mean of its divisors is an integer number (64917153).

Almost surely, 2^799580665 is an apocalyptic number.

It is an amenable number.

799580665 is a deficient number, since it is larger than the sum of its proper divisors (239093783).

799580665 is a wasteful number, since it uses less digits than its factorization.

799580665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63948.

The product of its (nonzero) digits is 4082400, while the sum is 55.

The square root of 799580665 is about 28276.8574102569. The cubic root of 799580665 is about 928.1555399867.

The spelling of 799580665 in words is "seven hundred ninety-nine million, five hundred eighty thousand, six hundred sixty-five".