66345 has 8 divisors (see below), whose sum is σ = 106176. Its totient is φ = 35376.

The previous prime is 66343. The next prime is 66347. The reversal of 66345 is 54366.

It is an interprime number because it is at equal distance from previous prime (66343) and next prime (66347).

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

It is not a de Polignac number, because 66345 - 2¹ = 66343 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66343) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2197 + ... + 2226.

It is an arithmetic number, because the mean of its divisors is an integer number (13272).

2⁶⁶³⁴⁵ is an apocalyptic number.

It is an amenable number.

66345 is a deficient number, since it is larger than the sum of its proper divisors (39831).

66345 is a wasteful number, since it uses less digits than its factorization.

66345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4431.

The product of its digits is 2160, while the sum is 24.

The square root of 66345 is about 257.5752317285. The cubic root of 66345 is about 40.4826934134.

The spelling of 66345 in words is "sixty-six thousand, three hundred forty-five".