66660222009 has 8 divisors (see below), whose sum is σ = 89208268672. Its totient is φ = 44276161680.

The previous prime is 66660222007. The next prime is 66660222011. The reversal of 66660222009 is 90022206666.

It is an interprime number because it is at equal distance from previous prime (66660222007) and next prime (66660222011).

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

It is not a de Polignac number, because 66660222009 - 2¹ = 66660222007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66660222001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40995634 + ... + 40997259.

It is an arithmetic number, because the mean of its divisors is an integer number (11151033584).

Almost surely, 2^66660222009 is an apocalyptic number.

It is an amenable number.

66660222009 is a deficient number, since it is larger than the sum of its proper divisors (22548046663).

66660222009 is a wasteful number, since it uses less digits than its factorization.

66660222009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81993167.

The product of its (nonzero) digits is 93312, while the sum is 39.

The spelling of 66660222009 in words is "sixty-six billion, six hundred sixty million, two hundred twenty-two thousand, nine".