66976361 has 2 divisors, whose sum is σ = 66976362. Its totient is φ = 66976360.

The previous prime is 66976333. The next prime is 66976367. The reversal of 66976361 is 16367966.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66667225 + 309136 = 8165^2 + 556^2 .

It is a cyclic number.

It is not a de Polignac number, because 66976361 - 2⁶ = 66976297 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (66976367) 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, 33488180 + 33488181.

It is an arithmetic number, because the mean of its divisors is an integer number (33488181).

Almost surely, 2^66976361 is an apocalyptic number.

It is an amenable number.

66976361 is a deficient number, since it is larger than the sum of its proper divisors (1).

66976361 is an equidigital number, since it uses as much as digits as its factorization.

66976361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 244944, while the sum is 44.

The square root of 66976361 is about 8183.9086627357. The cubic root of 66976361 is about 406.1070377912.

The spelling of 66976361 in words is "sixty-six million, nine hundred seventy-six thousand, three hundred sixty-one".