66546371 has 2 divisors, whose sum is σ = 66546372. Its totient is φ = 66546370.

The previous prime is 66546307. The next prime is 66546373. The reversal of 66546371 is 17364566.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66546371 - 2⁶ = 66546307 is a prime.

Together with 66546373, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (66546373) 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, 33273185 + 33273186.

It is an arithmetic number, because the mean of its divisors is an integer number (33273186).

Almost surely, 2^66546371 is an apocalyptic number.

66546371 is a deficient number, since it is larger than the sum of its proper divisors (1).

66546371 is an equidigital number, since it uses as much as digits as its factorization.

66546371 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 90720, while the sum is 38.

The square root of 66546371 is about 8157.5959081092. The cubic root of 66546371 is about 405.2360986833.

The spelling of 66546371 in words is "sixty-six million, five hundred forty-six thousand, three hundred seventy-one".