66730 has 8 divisors (see below), whose sum is σ = 120132. Its totient is φ = 26688.

The previous prime is 66721. The next prime is 66733. The reversal of 66730 is 3766.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 58081 + 8649 = 241^2 + 93^2 .

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

It is not an unprimeable number, because it can be changed into a prime (66733) 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, 3327 + ... + 3346.

2⁶⁶⁷³⁰ is an apocalyptic number.

66730 is a deficient number, since it is larger than the sum of its proper divisors (53402).

66730 is a wasteful number, since it uses less digits than its factorization.

66730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6680.

The product of its (nonzero) digits is 756, while the sum is 22.

The square root of 66730 is about 258.3215051056. The cubic root of 66730 is about 40.5608494441.

The spelling of 66730 in words is "sixty-six thousand, seven hundred thirty".