66214325917 has 2 divisors, whose sum is σ = 66214325918. Its totient is φ = 66214325916.

The previous prime is 66214325873. The next prime is 66214325921. The reversal of 66214325917 is 71952341266.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38688529636 + 27525796281 = 196694^2 + 165909^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66214325917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66214325927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33107162958 + 33107162959.

It is an arithmetic number, because the mean of its divisors is an integer number (33107162959).

Almost surely, 2^66214325917 is an apocalyptic number.

It is an amenable number.

66214325917 is a deficient number, since it is larger than the sum of its proper divisors (1).

66214325917 is an equidigital number, since it uses as much as digits as its factorization.

66214325917 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 544320, while the sum is 46.

The spelling of 66214325917 in words is "sixty-six billion, two hundred fourteen million, three hundred twenty-five thousand, nine hundred seventeen".