66485833 has 2 divisors, whose sum is σ = 66485834. Its totient is φ = 66485832.

The previous prime is 66485831. The next prime is 66485849. The reversal of 66485833 is 33858466.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66129424 + 356409 = 8132^2 + 597^2 .

It is a cyclic number.

It is not a de Polignac number, because 66485833 - 2¹ = 66485831 is a prime.

Together with 66485831, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 66485833.

It is not a weakly prime, because it can be changed into another prime (66485831) 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, 33242916 + 33242917.

It is an arithmetic number, because the mean of its divisors is an integer number (33242917).

Almost surely, 2^66485833 is an apocalyptic number.

It is an amenable number.

66485833 is a deficient number, since it is larger than the sum of its proper divisors (1).

66485833 is an equidigital number, since it uses as much as digits as its factorization.

66485833 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 414720, while the sum is 43.

The square root of 66485833 is about 8153.8845343799. The cubic root of 66485833 is about 405.1131787534.

The spelling of 66485833 in words is "sixty-six million, four hundred eighty-five thousand, eight hundred thirty-three".