66349 has 4 divisors (see below), whose sum is σ = 67936. Its totient is φ = 64764.

The previous prime is 66347. The next prime is 66359. The reversal of 66349 is 94366.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 66349 - 2¹ = 66347 is a prime.

It is a Duffinian number.

66349 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66343) 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 3 ways as a sum of consecutive naturals, for example, 729 + ... + 814.

It is an arithmetic number, because the mean of its divisors is an integer number (16984).

2⁶⁶³⁴⁹ is an apocalyptic number.

It is an amenable number.

66349 is a deficient number, since it is larger than the sum of its proper divisors (1587).

66349 is a wasteful number, since it uses less digits than its factorization.

66349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1586.

The product of its digits is 3888, while the sum is 28.

The square root of 66349 is about 257.5829963332. The cubic root of 66349 is about 40.4835069764.

The spelling of 66349 in words is "sixty-six thousand, three hundred forty-nine".