66386733768373 has 2 divisors, whose sum is σ = 66386733768374. Its totient is φ = 66386733768372.

The previous prime is 66386733768347. The next prime is 66386733768389. The reversal of 66386733768373 is 37386733768366.

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., 63825431202724 + 2561302565649 = 7989082^2 + 1600407^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66386733768373 is a prime.

It is a super-3 number, since 3×66386733768373³ (a number of 42 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 66386733768373.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66386733768323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33193366884186 + 33193366884187.

It is an arithmetic number, because the mean of its divisors is an integer number (33193366884187).

Almost surely, 2^{66386733768373} is an apocalyptic number.

It is an amenable number.

66386733768373 is a deficient number, since it is larger than the sum of its proper divisors (1).

66386733768373 is an equidigital number, since it uses as much as digits as its factorization.

66386733768373 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6913299456, while the sum is 76.

The spelling of 66386733768373 in words is "sixty-six trillion, three hundred eighty-six billion, seven hundred thirty-three million, seven hundred sixty-eight thousand, three hundred seventy-three".