66675629 has 2 divisors, whose sum is σ = 66675630. Its totient is φ = 66675628.

The previous prime is 66675613. The next prime is 66675667. The reversal of 66675629 is 92657666.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57078025 + 9597604 = 7555^2 + 3098^2 .

It is a cyclic number.

It is not a de Polignac number, because 66675629 - 2⁴ = 66675613 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66675029) 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, 33337814 + 33337815.

It is an arithmetic number, because the mean of its divisors is an integer number (33337815).

Almost surely, 2^66675629 is an apocalyptic number.

It is an amenable number.

66675629 is a deficient number, since it is larger than the sum of its proper divisors (1).

66675629 is an equidigital number, since it uses as much as digits as its factorization.

66675629 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 816480, while the sum is 47.

The square root of 66675629 is about 8165.5146194223. The cubic root of 66675629 is about 405.4983024646.

The spelling of 66675629 in words is "sixty-six million, six hundred seventy-five thousand, six hundred twenty-nine".