660166597 has 2 divisors, whose sum is σ = 660166598. Its totient is φ = 660166596.

The previous prime is 660166561. The next prime is 660166651. The reversal of 660166597 is 795661066.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 656948161 + 3218436 = 25631^2 + 1794^2 .

It is a cyclic number.

It is not a de Polignac number, because 660166597 - 2¹⁵ = 660133829 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (660166537) 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 as a sum of consecutive naturals, namely, 330083298 + 330083299.

It is an arithmetic number, because the mean of its divisors is an integer number (330083299).

Almost surely, 2^660166597 is an apocalyptic number.

It is an amenable number.

660166597 is a deficient number, since it is larger than the sum of its proper divisors (1).

660166597 is an equidigital number, since it uses as much as digits as its factorization.

660166597 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 408240, while the sum is 46.

The square root of 660166597 is about 25693.7073424603. The cubic root of 660166597 is about 870.7320200953.

The spelling of 660166597 in words is "six hundred sixty million, one hundred sixty-six thousand, five hundred ninety-seven".