6626675538289 has 3 divisors (see below), whose sum is σ = 6626678112523. Its totient is φ = 6626672964056.

The previous prime is 6626675538229. The next prime is 6626675538349. The reversal of 6626675538289 is 9828355766266.

It is a happy number.

The square root of 6626675538289 is 2574233.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (6626675538229) and next prime (6626675538349).

It can be written as a sum of positive squares in only one way, i.e., 6579148050225 + 47527488064 = 2564985^2 + 218008^2 .

It is not a de Polignac number, because 6626675538289 - 2⁹ = 6626675537777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6626675538229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1287117 + ... + 3861349.

Almost surely, 2^{6626675538289} is an apocalyptic number.

6626675538289 is the 2574233-rd square number.

6626675538289 is the 1287117-th centered octagonal number.

It is an amenable number.

6626675538289 is a deficient number, since it is larger than the sum of its proper divisors (2574234).

6626675538289 is an frugal number, since it uses more digits than its factorization.

6626675538289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5148466 (or 2574233 counting only the distinct ones).

The product of its digits is 1567641600, while the sum is 73.

The spelling of 6626675538289 in words is "six trillion, six hundred twenty-six billion, six hundred seventy-five million, five hundred thirty-eight thousand, two hundred eighty-nine".