66330231 has 16 divisors (see below), whose sum is σ = 96849408. Its totient is φ = 40046400.

The previous prime is 66330211. The next prime is 66330239. The reversal of 66330231 is 13203366.

It is not a de Polignac number, because 66330231 - 2⁶ = 66330167 is a prime.

It is a super-2 number, since 2×66330231² = 8799399089026722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66330239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5235 + ... + 12651.

It is an arithmetic number, because the mean of its divisors is an integer number (6053088).

Almost surely, 2^66330231 is an apocalyptic number.

66330231 is a deficient number, since it is larger than the sum of its proper divisors (30519177).

66330231 is a wasteful number, since it uses less digits than its factorization.

66330231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7702.

The product of its (nonzero) digits is 1944, while the sum is 24.

The square root of 66330231 is about 8144.3373579439. The cubic root of 66330231 is about 404.7968925193.

Adding to 66330231 its reverse (13203366), we get a palindrome (79533597).

The spelling of 66330231 in words is "sixty-six million, three hundred thirty thousand, two hundred thirty-one".