66636234212 has 12 divisors (see below), whose sum is σ = 117205357500. Its totient is φ = 33148989216.

The previous prime is 66636234193. The next prime is 66636234229. The reversal of 66636234212 is 21243263666.

It can be written as a sum of positive squares in 2 ways, for example, as 57861415936 + 8774818276 = 240544^2 + 93674^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 66636234212.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42281087 + ... + 42282662.

It is an arithmetic number, because the mean of its divisors is an integer number (9767113125).

Almost surely, 2^66636234212 is an apocalyptic number.

It is an amenable number.

66636234212 is a deficient number, since it is larger than the sum of its proper divisors (50569123288).

66636234212 is a wasteful number, since it uses less digits than its factorization.

66636234212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84563950 (or 84563948 counting only the distinct ones).

The product of its digits is 373248, while the sum is 41.

Adding to 66636234212 its reverse (21243263666), we get a palindrome (87879497878).

The spelling of 66636234212 in words is "sixty-six billion, six hundred thirty-six million, two hundred thirty-four thousand, two hundred twelve".