66896069866 has 4 divisors (see below), whose sum is σ = 100344104802. Its totient is φ = 33448034932.

The previous prime is 66896069837. The next prime is 66896069881.

66896069866 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 53049605625 + 13846464241 = 230325^2 + 117671^2 .

It is a junction number, because it is equal to n+sod(n) for n = 66896069795 and 66896069804.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 16724017465 + ... + 16724017468.

Almost surely, 2^66896069866 is an apocalyptic number.

66896069866 is a deficient number, since it is larger than the sum of its proper divisors (33448034936).

66896069866 is a wasteful number, since it uses less digits than its factorization.

66896069866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33448034935.

The product of its (nonzero) digits is 241864704, while the sum is 70.

The spelling of 66896069866 in words is "sixty-six billion, eight hundred ninety-six million, sixty-nine thousand, eight hundred sixty-six".