66303981106651 has 2 divisors, whose sum is σ = 66303981106652. Its totient is φ = 66303981106650.

The previous prime is 66303981106633. The next prime is 66303981106673. The reversal of 66303981106651 is 15660118930366.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66303981106651 is a prime.

It is a super-2 number, since 2×66303981106651² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 66303981106592 and 66303981106601.

It is not a weakly prime, because it can be changed into another prime (66303981136651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33151990553325 + 33151990553326.

It is an arithmetic number, because the mean of its divisors is an integer number (33151990553326).

Almost surely, 2^{66303981106651} is an apocalyptic number.

66303981106651 is a deficient number, since it is larger than the sum of its proper divisors (1).

66303981106651 is an equidigital number, since it uses as much as digits as its factorization.

66303981106651 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4199040, while the sum is 55.

The spelling of 66303981106651 in words is "sixty-six trillion, three hundred three billion, nine hundred eighty-one million, one hundred six thousand, six hundred fifty-one".