66660000001 has 8 divisors (see below), whose sum is σ = 76193639424. Its totient is φ = 57129056160.

The previous prime is 66659999983. The next prime is 66660000061. The reversal of 66660000001 is 10000006666.

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

It is a cyclic number.

It is not a de Polignac number, because 66660000001 - 2⁹ = 66659999489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66660000061) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 620620 + ... + 720061.

It is an arithmetic number, because the mean of its divisors is an integer number (9524204928).

Almost surely, 2^66660000001 is an apocalyptic number.

It is an amenable number.

66660000001 is a deficient number, since it is larger than the sum of its proper divisors (9533639423).

66660000001 is a wasteful number, since it uses less digits than its factorization.

66660000001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1347791.

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 66660000001 its reverse (10000006666), we get a palindrome (76660006667).

The spelling of 66660000001 in words is "sixty-six billion, six hundred sixty million, one", and thus it is an aban number.