66797 has 2 divisors, whose sum is σ = 66798. Its totient is φ = 66796.

The previous prime is 66791. The next prime is 66809. The reversal of 66797 is 79766.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48841 + 17956 = 221^2 + 134^2 .

It is a cyclic number.

It is not a de Polignac number, because 66797 - 2⁶ = 66733 is a prime.

It is a Chen prime.

It is a plaindrome in base 9.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33398 + 33399.

It is an arithmetic number, because the mean of its divisors is an integer number (33399).

2⁶⁶⁷⁹⁷ is an apocalyptic number.

It is an amenable number.

66797 is a deficient number, since it is larger than the sum of its proper divisors (1).

66797 is an equidigital number, since it uses as much as digits as its factorization.

66797 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15876, while the sum is 35.

The square root of 66797 is about 258.4511559270. The cubic root of 66797 is about 40.5744198917.

The spelling of 66797 in words is "sixty-six thousand, seven hundred ninety-seven".