66947 has 2 divisors, whose sum is σ = 66948. Its totient is φ = 66946.

The previous prime is 66943. The next prime is 66949. The reversal of 66947 is 74966.

It is a strong prime.

66947 is a truncatable prime.

It is a cyclic number.

It is not a de Polignac number, because 66947 - 2² = 66943 is a prime.

Together with 66949, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (66943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33473 + 33474.

It is an arithmetic number, because the mean of its divisors is an integer number (33474).

2⁶⁶⁹⁴⁷ is an apocalyptic number.

66947 is a deficient number, since it is larger than the sum of its proper divisors (1).

66947 is an equidigital number, since it uses as much as digits as its factorization.

66947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9072, while the sum is 32.

The square root of 66947 is about 258.7411834247. The cubic root of 66947 is about 40.6047686246.

Subtracting from 66947 its product of digits (9072), we obtain a palindrome (57875).

The spelling of 66947 in words is "sixty-six thousand, nine hundred forty-seven".