66814 has 8 divisors (see below), whose sum is σ = 109368. Its totient is φ = 30360.

The previous prime is 66809. The next prime is 66821. The reversal of 66814 is 41866.

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

It is a super-2 number, since 2×66814² = 8928221192, which contains 22 as substring.

66814 is a modest number, since divided by 814 gives 66 as remainder.

It is a plaindrome in base 9.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1497 + ... + 1540.

It is an arithmetic number, because the mean of its divisors is an integer number (13671).

2⁶⁶⁸¹⁴ is an apocalyptic number.

66814 is a deficient number, since it is larger than the sum of its proper divisors (42554).

66814 is a wasteful number, since it uses less digits than its factorization.

66814 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3050.

The product of its digits is 1152, while the sum is 25.

The square root of 66814 is about 258.4840420606. The cubic root of 66814 is about 40.5778616961.

The spelling of 66814 in words is "sixty-six thousand, eight hundred fourteen".