66653683 has 2 divisors, whose sum is σ = 66653684. Its totient is φ = 66653682.

The previous prime is 66653681. The next prime is 66653711. The reversal of 66653683 is 38635666.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66653683 - 2¹ = 66653681 is a prime.

Together with 66653681, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (66653681) 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, 33326841 + 33326842.

It is an arithmetic number, because the mean of its divisors is an integer number (33326842).

Almost surely, 2^66653683 is an apocalyptic number.

66653683 is a deficient number, since it is larger than the sum of its proper divisors (1).

66653683 is an equidigital number, since it uses as much as digits as its factorization.

66653683 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 466560, while the sum is 43.

The square root of 66653683 is about 8164.1706866038. The cubic root of 66653683 is about 405.4538082348.

The spelling of 66653683 in words is "sixty-six million, six hundred fifty-three thousand, six hundred eighty-three".