66316434388 has 12 divisors (see below), whose sum is σ = 122161852960. Its totient is φ = 31413047832.

The previous prime is 66316434383. The next prime is 66316434397. The reversal of 66316434388 is 88343461366.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66316434383) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 436292256 + ... + 436292407.

Almost surely, 2^66316434388 is an apocalyptic number.

It is an amenable number.

66316434388 is a deficient number, since it is larger than the sum of its proper divisors (55845418572).

66316434388 is a wasteful number, since it uses less digits than its factorization.

66316434388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 872584686 (or 872584684 counting only the distinct ones).

The product of its digits is 5971968, while the sum is 52.

The spelling of 66316434388 in words is "sixty-six billion, three hundred sixteen million, four hundred thirty-four thousand, three hundred eighty-eight".