66946 has 16 divisors (see below), whose sum is σ = 116640. Its totient is φ = 28480.

The previous prime is 66943. The next prime is 66947. The reversal of 66946 is 64966.

It is not an unprimeable number, because it can be changed into a prime (66943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 285 + ... + 463.

It is an arithmetic number, because the mean of its divisors is an integer number (7290).

2⁶⁶⁹⁴⁶ is an apocalyptic number.

66946 is a deficient number, since it is larger than the sum of its proper divisors (49694).

66946 is a wasteful number, since it uses less digits than its factorization.

66946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209.

The product of its digits is 7776, while the sum is 31.

The square root of 66946 is about 258.7392509845. The cubic root of 66946 is about 40.6045664499.

The spelling of 66946 in words is "sixty-six thousand, nine hundred forty-six".