2686664443 has 2 divisors, whose sum is σ = 2686664444. Its totient is φ = 2686664442.

The previous prime is 2686664399. The next prime is 2686664447. The reversal of 2686664443 is 3444666862.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2686664443 is a prime.

It is not a weakly prime, because it can be changed into another prime (2686664447) by changing a digit.

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 as a sum of consecutive naturals, namely, 1343332221 + 1343332222.

It is an arithmetic number, because the mean of its divisors is an integer number (1343332222).

Almost surely, 2^2686664443 is an apocalyptic number.

2686664443 is a deficient number, since it is larger than the sum of its proper divisors (1).

2686664443 is an equidigital number, since it uses as much as digits as its factorization.

2686664443 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3981312, while the sum is 49.

The square root of 2686664443 is about 51833.0439295243. The cubic root of 2686664443 is about 1390.1803404542.

The spelling of 2686664443 in words is "two billion, six hundred eighty-six million, six hundred sixty-four thousand, four hundred forty-three".