66039773251 has 2 divisors, whose sum is σ = 66039773252. Its totient is φ = 66039773250.

The previous prime is 66039773183. The next prime is 66039773281. The reversal of 66039773251 is 15237793066.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66039773251 - 2⁹ = 66039772739 is a prime.

It is a super-2 number, since 2×66039773251² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 66039773195 and 66039773204.

It is not a weakly prime, because it can be changed into another prime (66039773281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33019886625 + 33019886626.

It is an arithmetic number, because the mean of its divisors is an integer number (33019886626).

Almost surely, 2^66039773251 is an apocalyptic number.

66039773251 is a deficient number, since it is larger than the sum of its proper divisors (1).

66039773251 is an equidigital number, since it uses as much as digits as its factorization.

66039773251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1428840, while the sum is 49.

The spelling of 66039773251 in words is "sixty-six billion, thirty-nine million, seven hundred seventy-three thousand, two hundred fifty-one".