66206001317 has 2 divisors, whose sum is σ = 66206001318. Its totient is φ = 66206001316.

The previous prime is 66206001311. The next prime is 66206001341. The reversal of 66206001317 is 71310060266.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50861976676 + 15344024641 = 225526^2 + 123871^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66206001317 is a prime.

It is a super-2 number, since 2×66206001317² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66206001311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33103000658 + 33103000659.

It is an arithmetic number, because the mean of its divisors is an integer number (33103000659).

Almost surely, 2^66206001317 is an apocalyptic number.

It is an amenable number.

66206001317 is a deficient number, since it is larger than the sum of its proper divisors (1).

66206001317 is an equidigital number, since it uses as much as digits as its factorization.

66206001317 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 32.

The spelling of 66206001317 in words is "sixty-six billion, two hundred six million, one thousand, three hundred seventeen".