66312130 has 8 divisors (see below), whose sum is σ = 119361852. Its totient is φ = 26524848.

The previous prime is 66312119. The next prime is 66312133. The reversal of 66312130 is 3121366.

It can be written as a sum of positive squares in 2 ways, for example, as 57744801 + 8567329 = 7599^2 + 2927^2 .

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 (66312133) 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 3 ways as a sum of consecutive naturals, for example, 3315597 + ... + 3315616.

Almost surely, 2^66312130 is an apocalyptic number.

66312130 is a deficient number, since it is larger than the sum of its proper divisors (53049722).

66312130 is a wasteful number, since it uses less digits than its factorization.

66312130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6631220.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 66312130 is about 8143.2260192138. The cubic root of 66312130 is about 404.7600672032.

Adding to 66312130 its reverse (3121366), we get a palindrome (69433496).

It can be divided in two parts, 6 and 6312130, that added together give a palindrome (6312136).

The spelling of 66312130 in words is "sixty-six million, three hundred twelve thousand, one hundred thirty".