66039 has 4 divisors (see below), whose sum is σ = 88056. Its totient is φ = 44024.

The previous prime is 66037. The next prime is 66041. The reversal of 66039 is 93066.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (66037) and next prime (66041).

It is a cyclic number.

It is not a de Polignac number, because 66039 - 2¹ = 66037 is a prime.

It is a super-2 number, since 2×66039² = 8722299042, which contains 22 as substring.

It is a D-number.

66039 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66037) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11004 + ... + 11009.

It is an arithmetic number, because the mean of its divisors is an integer number (22014).

2⁶⁶⁰³⁹ is an apocalyptic number.

66039 is a deficient number, since it is larger than the sum of its proper divisors (22017).

66039 is a wasteful number, since it uses less digits than its factorization.

66039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22016.

The product of its (nonzero) digits is 972, while the sum is 24.

The square root of 66039 is about 256.9805440106. The cubic root of 66039 is about 40.4203586571.

The spelling of 66039 in words is "sixty-six thousand, thirty-nine".