66290 has 16 divisors (see below), whose sum is σ = 136512. Its totient is φ = 22704.

The previous prime is 66271. The next prime is 66293. The reversal of 66290 is 9266.

It is not an unprimeable number, because it can be changed into a prime (66293) 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 7 ways as a sum of consecutive naturals, for example, 404 + ... + 543.

It is an arithmetic number, because the mean of its divisors is an integer number (8532).

2⁶⁶²⁹⁰ is an apocalyptic number.

66290 is an abundant number, since it is smaller than the sum of its proper divisors (70222).

It is a weird number, because it is abundant, but not a pseudoperfect number.

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68256).

66290 is a wasteful number, since it uses less digits than its factorization.

66290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 961.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 66290 is about 257.4684446685. The cubic root of 66290 is about 40.4715036041.

The spelling of 66290 in words is "sixty-six thousand, two hundred ninety".