665606107 has 2 divisors, whose sum is σ = 665606108. Its totient is φ = 665606106.

The previous prime is 665606101. The next prime is 665606113. The reversal of 665606107 is 701606566.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (665606101) and next prime (665606113).

It is a cyclic number.

It is not a de Polignac number, because 665606107 - 2⁷ = 665605979 is a prime.

It is not a weakly prime, because it can be changed into another prime (665606101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332803053 + 332803054.

It is an arithmetic number, because the mean of its divisors is an integer number (332803054).

Almost surely, 2^665606107 is an apocalyptic number.

665606107 is a deficient number, since it is larger than the sum of its proper divisors (1).

665606107 is an equidigital number, since it uses as much as digits as its factorization.

665606107 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 665606107 is about 25799.3431505533. The cubic root of 665606107 is about 873.1169767678.

The spelling of 665606107 in words is "six hundred sixty-five million, six hundred six thousand, one hundred seven".