66962617 has 2 divisors, whose sum is σ = 66962618. Its totient is φ = 66962616.

The previous prime is 66962549. The next prime is 66962629. The reversal of 66962617 is 71626966.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66928761 + 33856 = 8181^2 + 184^2 .

66962617 is a truncatable prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66962617 is a prime.

It is not a weakly prime, because it can be changed into another prime (66962317) 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, 33481308 + 33481309.

It is an arithmetic number, because the mean of its divisors is an integer number (33481309).

Almost surely, 2^66962617 is an apocalyptic number.

It is an amenable number.

66962617 is a deficient number, since it is larger than the sum of its proper divisors (1).

66962617 is an equidigital number, since it uses as much as digits as its factorization.

66962617 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 163296, while the sum is 43.

The square root of 66962617 is about 8183.0689230875. The cubic root of 66962617 is about 406.0792572585.

The spelling of 66962617 in words is "sixty-six million, nine hundred sixty-two thousand, six hundred seventeen".