66700349 has 2 divisors, whose sum is σ = 66700350. Its totient is φ = 66700348.

The previous prime is 66700339. The next prime is 66700363. The reversal of 66700349 is 94300766.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66667225 + 33124 = 8165^2 + 182^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66700349 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 (66700339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33350174 + 33350175.

It is an arithmetic number, because the mean of its divisors is an integer number (33350175).

Almost surely, 2^66700349 is an apocalyptic number.

It is an amenable number.

66700349 is a deficient number, since it is larger than the sum of its proper divisors (1).

66700349 is an equidigital number, since it uses as much as digits as its factorization.

66700349 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 35.

The square root of 66700349 is about 8167.0281620673. The cubic root of 66700349 is about 405.5484091260.

The spelling of 66700349 in words is "sixty-six million, seven hundred thousand, three hundred forty-nine".