799665566997 has 16 divisors (see below), whose sum is σ = 1164584171520. Its totient is φ = 484048191600.

The previous prime is 799665566977. The next prime is 799665567031.

799665566997 is nontrivially palindromic in base 10.

799665566997 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 799665566997 - 2¹⁸ = 799665304853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (799665566927) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14912997 + ... + 14966522.

It is an arithmetic number, because the mean of its divisors is an integer number (72786510720).

Almost surely, 2^799665566997 is an apocalyptic number.

It is an amenable number.

799665566997 is a deficient number, since it is larger than the sum of its proper divisors (364918604523).

799665566997 is a wasteful number, since it uses less digits than its factorization.

799665566997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29880344.

The product of its digits is 10416243600, while the sum is 84.

The spelling of 799665566997 in words is "seven hundred ninety-nine billion, six hundred sixty-five million, five hundred sixty-six thousand, nine hundred ninety-seven".