66605064310597 has 4 divisors (see below), whose sum is σ = 66605542381836. Its totient is φ = 66604586239360.

The previous prime is 66605064310571. The next prime is 66605064310607. The reversal of 66605064310597 is 79501346050666.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16649655999201 + 49955408311396 = 4080399^2 + 7067914^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66605064310597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66605064310537) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 238826578 + ... + 239105299.

It is an arithmetic number, because the mean of its divisors is an integer number (16651385595459).

Almost surely, 2^{66605064310597} is an apocalyptic number.

It is an amenable number.

66605064310597 is a deficient number, since it is larger than the sum of its proper divisors (478071239).

66605064310597 is a wasteful number, since it uses less digits than its factorization.

66605064310597 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 478071238.

The product of its (nonzero) digits is 24494400, while the sum is 58.

The spelling of 66605064310597 in words is "sixty-six trillion, six hundred five billion, sixty-four million, three hundred ten thousand, five hundred ninety-seven".