2686666798 has 16 divisors (see below), whose sum is σ = 4115517840. Its totient is φ = 1315036800.

The previous prime is 2686666783. The next prime is 2686666799. The reversal of 2686666798 is 8976666862.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2686666799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26443 + ... + 77926.

It is an arithmetic number, because the mean of its divisors is an integer number (257219865).

Almost surely, 2^2686666798 is an apocalyptic number.

2686666798 is a deficient number, since it is larger than the sum of its proper divisors (1428851042).

2686666798 is a wasteful number, since it uses less digits than its factorization.

2686666798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104643.

The product of its digits is 62705664, while the sum is 64.

The square root of 2686666798 is about 51833.0666466880. The cubic root of 2686666798 is about 1390.1807466423.

Adding to 2686666798 its sum of digits (64), we get a palindrome (2686666862).

The spelling of 2686666798 in words is "two billion, six hundred eighty-six million, six hundred sixty-six thousand, seven hundred ninety-eight".