66065843 has 2 divisors, whose sum is σ = 66065844. Its totient is φ = 66065842.

The previous prime is 66065837. The next prime is 66065873. The reversal of 66065843 is 34856066.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66065843 - 2¹² = 66061747 is a prime.

It is a super-2 number, since 2×66065843² = 8729391222601298, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 66065797 and 66065806.

It is not a weakly prime, because it can be changed into another prime (66065833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33032921 + 33032922.

It is an arithmetic number, because the mean of its divisors is an integer number (33032922).

Almost surely, 2^66065843 is an apocalyptic number.

66065843 is a deficient number, since it is larger than the sum of its proper divisors (1).

66065843 is an equidigital number, since it uses as much as digits as its factorization.

66065843 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 103680, while the sum is 38.

The square root of 66065843 is about 8128.0897509809. The cubic root of 66065843 is about 404.2583449566.

The spelling of 66065843 in words is "sixty-six million, sixty-five thousand, eight hundred forty-three".