66143330 has 32 divisors (see below), whose sum is σ = 131241600. Its totient is φ = 23800320.

The previous prime is 66143323. The next prime is 66143333. The reversal of 66143330 is 3334166.

It is a self number, because there is not a number n which added to its sum of digits gives 66143330.

It is not an unprimeable number, because it can be changed into a prime (66143333) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7571 + ... + 13769.

It is an arithmetic number, because the mean of its divisors is an integer number (4101300).

Almost surely, 2^66143330 is an apocalyptic number.

66143330 is a deficient number, since it is larger than the sum of its proper divisors (65098270).

66143330 is a wasteful number, since it uses less digits than its factorization.

66143330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6314.

The product of its (nonzero) digits is 3888, while the sum is 26.

The square root of 66143330 is about 8132.8549722714. The cubic root of 66143330 is about 404.4163314251.

Adding to 66143330 its reverse (3334166), we get a palindrome (69477496).

The spelling of 66143330 in words is "sixty-six million, one hundred forty-three thousand, three hundred thirty".