66704101 has 2 divisors, whose sum is σ = 66704102. Its totient is φ = 66704100.

The previous prime is 66704047. The next prime is 66704149. The reversal of 66704101 is 10140766.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 59136100 + 7568001 = 7690^2 + 2751^2 .

It is a cyclic number.

It is not a de Polignac number, because 66704101 - 2⁹ = 66703589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66704191) 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, 33352050 + 33352051.

It is an arithmetic number, because the mean of its divisors is an integer number (33352051).

Almost surely, 2^66704101 is an apocalyptic number.

It is an amenable number.

66704101 is a deficient number, since it is larger than the sum of its proper divisors (1).

66704101 is an equidigital number, since it uses as much as digits as its factorization.

66704101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 66704101 is about 8167.2578629550. The cubic root of 66704101 is about 405.5560132297.

Adding to 66704101 its reverse (10140766), we get a palindrome (76844867).

The spelling of 66704101 in words is "sixty-six million, seven hundred four thousand, one hundred one".