66061 has 4 divisors (see below), whose sum is σ = 68224. Its totient is φ = 63900.

The previous prime is 66047. The next prime is 66067. The reversal of 66061 is 16066.

It is a happy number.

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 66061 - 2⁵ = 66029 is a prime.

It is a Duffinian number.

66061 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1035 + ... + 1096.

It is an arithmetic number, because the mean of its divisors is an integer number (17056).

2⁶⁶⁰⁶¹ is an apocalyptic number.

It is an amenable number.

66061 is a deficient number, since it is larger than the sum of its proper divisors (2163).

66061 is a wasteful number, since it uses less digits than its factorization.

66061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2162.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 66061 is about 257.0233452432. The cubic root of 66061 is about 40.4248466574.

The spelling of 66061 in words is "sixty-six thousand, sixty-one".