66732610393 has 2 divisors, whose sum is σ = 66732610394. Its totient is φ = 66732610392.

The previous prime is 66732610313. The next prime is 66732610397. The reversal of 66732610393 is 39301623766.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 59569188624 + 7163421769 = 244068^2 + 84637^2 .

It is a cyclic number.

It is not a de Polignac number, because 66732610393 - 2¹⁷ = 66732479321 is a prime.

It is a super-2 number, since 2×66732610393² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (66732610397) 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, 33366305196 + 33366305197.

It is an arithmetic number, because the mean of its divisors is an integer number (33366305197).

Almost surely, 2^66732610393 is an apocalyptic number.

It is an amenable number.

66732610393 is a deficient number, since it is larger than the sum of its proper divisors (1).

66732610393 is an equidigital number, since it uses as much as digits as its factorization.

66732610393 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 734832, while the sum is 46.

The spelling of 66732610393 in words is "sixty-six billion, seven hundred thirty-two million, six hundred ten thousand, three hundred ninety-three".