66622601 has 2 divisors, whose sum is σ = 66622602. Its totient is φ = 66622600.

The previous prime is 66622583. The next prime is 66622631. The reversal of 66622601 is 10622666.

66622601 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 58125376 + 8497225 = 7624^2 + 2915^2 .

It is a cyclic number.

It is not a de Polignac number, because 66622601 - 2¹⁴ = 66606217 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (66622631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33311300 + 33311301.

It is an arithmetic number, because the mean of its divisors is an integer number (33311301).

Almost surely, 2^66622601 is an apocalyptic number.

It is an amenable number.

66622601 is a deficient number, since it is larger than the sum of its proper divisors (1).

66622601 is an equidigital number, since it uses as much as digits as its factorization.

66622601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 66622601 is about 8162.2669032567. The cubic root of 66622601 is about 405.3907745852.

The spelling of 66622601 in words is "sixty-six million, six hundred twenty-two thousand, six hundred one".