66143012 has 24 divisors (see below), whose sum is σ = 126772800. Its totient is φ = 30008736.

The previous prime is 66142957. The next prime is 66143029. The reversal of 66143012 is 21034166.

It is a happy number.

It is a super-3 number, since 3×66143012³ (a number of 24 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7712 + ... + 13847.

It is an arithmetic number, because the mean of its divisors is an integer number (5282200).

Almost surely, 2^66143012 is an apocalyptic number.

It is an amenable number.

66143012 is a deficient number, since it is larger than the sum of its proper divisors (60629788).

66143012 is a wasteful number, since it uses less digits than its factorization.

66143012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21635 (or 21633 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 66143012 is about 8132.8354219177. The cubic root of 66143012 is about 404.4156833144.

Adding to 66143012 its reverse (21034166), we get a palindrome (87177178).

The spelling of 66143012 in words is "sixty-six million, one hundred forty-three thousand, twelve".