66466901 has 2 divisors, whose sum is σ = 66466902. Its totient is φ = 66466900.

The previous prime is 66466879. The next prime is 66466903. The reversal of 66466901 is 10966466.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61622500 + 4844401 = 7850^2 + 2201^2 .

It is a cyclic number.

It is not a de Polignac number, because 66466901 - 2¹⁸ = 66204757 is a prime.

Together with 66466903, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66466903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33233450 + 33233451.

It is an arithmetic number, because the mean of its divisors is an integer number (33233451).

Almost surely, 2^66466901 is an apocalyptic number.

It is an amenable number.

66466901 is a deficient number, since it is larger than the sum of its proper divisors (1).

66466901 is an equidigital number, since it uses as much as digits as its factorization.

66466901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46656, while the sum is 38.

The square root of 66466901 is about 8152.7235326607. The cubic root of 66466901 is about 405.0747227875.

The spelling of 66466901 in words is "sixty-six million, four hundred sixty-six thousand, nine hundred one".