66630383 has 4 divisors (see below), whose sum is σ = 66719160. Its totient is φ = 66541608.

The previous prime is 66630353. The next prime is 66630413. The reversal of 66630383 is 38303666.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 38303666 = 2 ⋅19151833.

It is an interprime number because it is at equal distance from previous prime (66630353) and next prime (66630413).

It is a cyclic number.

It is not a de Polignac number, because 66630383 - 2¹⁰ = 66629359 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66630353) 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, 43253 + ... + 44766.

It is an arithmetic number, because the mean of its divisors is an integer number (16679790).

Almost surely, 2^66630383 is an apocalyptic number.

66630383 is a deficient number, since it is larger than the sum of its proper divisors (88777).

66630383 is an equidigital number, since it uses as much as digits as its factorization.

66630383 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88776.

The product of its (nonzero) digits is 46656, while the sum is 35.

The square root of 66630383 is about 8162.7435951401. The cubic root of 66630383 is about 405.4065581588.

The spelling of 66630383 in words is "sixty-six million, six hundred thirty thousand, three hundred eighty-three".