66590 has 8 divisors (see below), whose sum is σ = 119880. Its totient is φ = 26632.

The previous prime is 66587. The next prime is 66593. The reversal of 66590 is 9566.

It is an interprime number because it is at equal distance from previous prime (66587) and next prime (66593).

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

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 66590.

It is not an unprimeable number, because it can be changed into a prime (66593) 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, 3320 + ... + 3339.

It is an arithmetic number, because the mean of its divisors is an integer number (14985).

2⁶⁶⁵⁹⁰ is an apocalyptic number.

66590 is a deficient number, since it is larger than the sum of its proper divisors (53290).

66590 is a wasteful number, since it uses less digits than its factorization.

66590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6666.

The product of its (nonzero) digits is 1620, while the sum is 26.

The square root of 66590 is about 258.0503826775. The cubic root of 66590 is about 40.5324639366.

Subtracting from 66590 its sum of digits (26), we obtain a square (66564 = 258²).

It can be divided in two parts, 66 and 590, that added together give a palindrome (656).

The spelling of 66590 in words is "sixty-six thousand, five hundred ninety".