66676067666 has 8 divisors (see below), whose sum is σ = 107707493964. Its totient is φ = 30773569680.

The previous prime is 66676067641. The next prime is 66676067681.

It is a happy number.

66676067666 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 2 ways, for example, as 64112772025 + 2563295641 = 253205^2 + 50629^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 66676067599 and 66676067608.

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, 1282232045 + ... + 1282232096.

Almost surely, 2^66676067666 is an apocalyptic number.

66676067666 is a deficient number, since it is larger than the sum of its proper divisors (41031426298).

66676067666 is a wasteful number, since it uses less digits than its factorization.

66676067666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2564464156.

The product of its (nonzero) digits is 82301184, while the sum is 62.

The spelling of 66676067666 in words is "sixty-six billion, six hundred seventy-six million, sixty-seven thousand, six hundred sixty-six".