6666575666237 has 2 divisors, whose sum is σ = 6666575666238. Its totient is φ = 6666575666236.

The previous prime is 6666575666083. The next prime is 6666575666327. The reversal of 6666575666237 is 7326665756666.

Together with next prime (6666575666327) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4332971133241 + 2333604532996 = 2081579^2 + 1527614^2 .

It is a cyclic number.

It is not a de Polignac number, because 6666575666237 - 2¹⁰ = 6666575665213 is a prime.

It is a super-2 number, since 2×6666575666237² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6666575606237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3333287833118 + 3333287833119.

It is an arithmetic number, because the mean of its divisors is an integer number (3333287833119).

Almost surely, 2^{6666575666237} is an apocalyptic number.

It is an amenable number.

6666575666237 is a deficient number, since it is larger than the sum of its proper divisors (1).

6666575666237 is an equidigital number, since it uses as much as digits as its factorization.

6666575666237 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2057529600, while the sum is 71.

The spelling of 6666575666237 in words is "six trillion, six hundred sixty-six billion, five hundred seventy-five million, six hundred sixty-six thousand, two hundred thirty-seven".