66660222007 has 2 divisors, whose sum is σ = 66660222008. Its totient is φ = 66660222006.

The previous prime is 66660222001. The next prime is 66660222011. The reversal of 66660222007 is 70022206666.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66660222007 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66660222001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33330111003 + 33330111004.

It is an arithmetic number, because the mean of its divisors is an integer number (33330111004).

Almost surely, 2^66660222007 is an apocalyptic number.

66660222007 is a deficient number, since it is larger than the sum of its proper divisors (1).

66660222007 is an equidigital number, since it uses as much as digits as its factorization.

66660222007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 37.

The spelling of 66660222007 in words is "sixty-six billion, six hundred sixty million, two hundred twenty-two thousand, seven".