66573629 has 2 divisors, whose sum is σ = 66573630. Its totient is φ = 66573628.

The previous prime is 66573583. The next prime is 66573641. The reversal of 66573629 is 92637566.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65642404 + 931225 = 8102^2 + 965^2 .

It is a cyclic number.

It is not a de Polignac number, because 66573629 - 2⁸ = 66573373 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66573629.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66573029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33286814 + 33286815.

It is an arithmetic number, because the mean of its divisors is an integer number (33286815).

Almost surely, 2^66573629 is an apocalyptic number.

It is an amenable number.

66573629 is a deficient number, since it is larger than the sum of its proper divisors (1).

66573629 is an equidigital number, since it uses as much as digits as its factorization.

66573629 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 408240, while the sum is 44.

The square root of 66573629 is about 8159.2664498716. The cubic root of 66573629 is about 405.2914205969.

The spelling of 66573629 in words is "sixty-six million, five hundred seventy-three thousand, six hundred twenty-nine".