66983 has 6 divisors (see below), whose sum is σ = 77976. Its totient is φ = 57372.

The previous prime is 66977. The next prime is 67003. The reversal of 66983 is 38966.

It is a happy number.

66983 is nontrivially palindromic in base 11.

It is not a de Polignac number, because 66983 - 2⁶ = 66919 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66923) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 635 + ... + 732.

It is an arithmetic number, because the mean of its divisors is an integer number (12996).

2⁶⁶⁹⁸³ is an apocalyptic number.

66983 is a deficient number, since it is larger than the sum of its proper divisors (10993).

66983 is a wasteful number, since it uses less digits than its factorization.

66983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1381 (or 1374 counting only the distinct ones).

The product of its digits is 7776, while the sum is 32.

The square root of 66983 is about 258.8107416627. The cubic root of 66983 is about 40.6120455737.

The spelling of 66983 in words is "sixty-six thousand, nine hundred eighty-three".