8255666799 has 16 divisors (see below), whose sum is σ = 12356710240. Its totient is φ = 5447036160.

The previous prime is 8255666791. The next prime is 8255666827. The reversal of 8255666799 is 9976665528.

It is not a de Polignac number, because 8255666799 - 2³ = 8255666791 is a prime.

It is a super-2 number, since 2×8255666799² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8255666791) 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, 1573492 + ... + 1578729.

It is an arithmetic number, because the mean of its divisors is an integer number (772294390).

Almost surely, 2^8255666799 is an apocalyptic number.

8255666799 is a deficient number, since it is larger than the sum of its proper divisors (4101043441).

8255666799 is a wasteful number, since it uses less digits than its factorization.

8255666799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3152327 (or 3152321 counting only the distinct ones).

The product of its digits is 48988800, while the sum is 63.

The square root of 8255666799 is about 90860.6999697889. The cubic root of 8255666799 is about 2021.0825487653.

The spelling of 8255666799 in words is "eight billion, two hundred fifty-five million, six hundred sixty-six thousand, seven hundred ninety-nine".