66929 has 8 divisors (see below), whose sum is σ = 73728. Its totient is φ = 60480.

The previous prime is 66923. The next prime is 66931. The reversal of 66929 is 92966.

Added to its reverse (92966) it gives a triangular number (159895 = T₅₆₅).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66929 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66895 and 66904.

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

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 464 + ... + 590.

It is an arithmetic number, because the mean of its divisors is an integer number (9216).

2⁶⁶⁹²⁹ is an apocalyptic number.

It is an amenable number.

66929 is a deficient number, since it is larger than the sum of its proper divisors (6799).

66929 is a wasteful number, since it uses less digits than its factorization.

66929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175.

The product of its digits is 5832, while the sum is 32.

The square root of 66929 is about 258.7063972924. The cubic root of 66929 is about 40.6011291718.

Adding to 66929 its reverse (92966), we get a triangular number (159895 = T₅₆₅).

The spelling of 66929 in words is "sixty-six thousand, nine hundred twenty-nine".