66084541 has 2 divisors, whose sum is σ = 66084542. Its totient is φ = 66084540.

The previous prime is 66084539. The next prime is 66084569. The reversal of 66084541 is 14548066.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62647225 + 3437316 = 7915^2 + 1854^2 .

It is a cyclic number.

It is not a de Polignac number, because 66084541 - 2¹ = 66084539 is a prime.

Together with 66084539, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 66084497 and 66084506.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66084521) 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, 33042270 + 33042271.

It is an arithmetic number, because the mean of its divisors is an integer number (33042271).

Almost surely, 2^66084541 is an apocalyptic number.

It is an amenable number.

66084541 is a deficient number, since it is larger than the sum of its proper divisors (1).

66084541 is an equidigital number, since it uses as much as digits as its factorization.

66084541 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 66084541 is about 8129.2398783650. The cubic root of 66084541 is about 404.2964791835.

The spelling of 66084541 in words is "sixty-six million, eighty-four thousand, five hundred forty-one".