66967741 has 2 divisors, whose sum is σ = 66967742. Its totient is φ = 66967740.

The previous prime is 66967739. The next prime is 66967759. The reversal of 66967741 is 14776966.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66765241 + 202500 = 8171^2 + 450^2 .

It is a cyclic number.

It is not a de Polignac number, because 66967741 - 2¹ = 66967739 is a prime.

Together with 66967739, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 66967691 and 66967700.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66967711) 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, 33483870 + 33483871.

It is an arithmetic number, because the mean of its divisors is an integer number (33483871).

Almost surely, 2^66967741 is an apocalyptic number.

It is an amenable number.

66967741 is a deficient number, since it is larger than the sum of its proper divisors (1).

66967741 is an equidigital number, since it uses as much as digits as its factorization.

66967741 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 381024, while the sum is 46.

The square root of 66967741 is about 8183.3820025708. The cubic root of 66967741 is about 406.0896147641.

The spelling of 66967741 in words is "sixty-six million, nine hundred sixty-seven thousand, seven hundred forty-one".