66318530 has 16 divisors (see below), whose sum is σ = 126395640. Its totient is φ = 24966912.

The previous prime is 66318491. The next prime is 66318533. The reversal of 66318530 is 3581366.

It can be written as a sum of positive squares in 4 ways, for example, as 39929761 + 26388769 = 6319^2 + 5137^2 .

It is not an unprimeable number, because it can be changed into a prime (66318533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 194885 + ... + 195224.

Almost surely, 2^66318530 is an apocalyptic number.

66318530 is a deficient number, since it is larger than the sum of its proper divisors (60077110).

66318530 is a wasteful number, since it uses less digits than its factorization.

66318530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390133.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 66318530 is about 8143.6189743872. The cubic root of 66318530 is about 404.7730883558.

Adding to 66318530 its reverse (3581366), we get a palindrome (69899896).

The spelling of 66318530 in words is "sixty-six million, three hundred eighteen thousand, five hundred thirty".