66962549 has 2 divisors, whose sum is σ = 66962550. Its totient is φ = 66962548.

The previous prime is 66962527. The next prime is 66962617. The reversal of 66962549 is 94526966.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40233649 + 26728900 = 6343^2 + 5170^2 .

It is a cyclic number.

It is not a de Polignac number, because 66962549 - 2¹⁶ = 66897013 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 (66962509) 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, 33481274 + 33481275.

It is an arithmetic number, because the mean of its divisors is an integer number (33481275).

Almost surely, 2^66962549 is an apocalyptic number.

It is an amenable number.

66962549 is a deficient number, since it is larger than the sum of its proper divisors (1).

66962549 is an equidigital number, since it uses as much as digits as its factorization.

66962549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 699840, while the sum is 47.

The square root of 66962549 is about 8183.0647681660. The cubic root of 66962549 is about 406.0791198017.

The spelling of 66962549 in words is "sixty-six million, nine hundred sixty-two thousand, five hundred forty-nine".