66066061979 has 2 divisors, whose sum is σ = 66066061980. Its totient is φ = 66066061978.

The previous prime is 66066061969. The next prime is 66066061987. The reversal of 66066061979 is 97916066066.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66066061979 - 2¹⁶ = 66065996443 is a prime.

It is not a weakly prime, because it can be changed into another prime (66066061969) 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, 33033030989 + 33033030990.

It is an arithmetic number, because the mean of its divisors is an integer number (33033030990).

Almost surely, 2^66066061979 is an apocalyptic number.

66066061979 is a deficient number, since it is larger than the sum of its proper divisors (1).

66066061979 is an equidigital number, since it uses as much as digits as its factorization.

66066061979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4408992, while the sum is 56.

The spelling of 66066061979 in words is "sixty-six billion, sixty-six million, sixty-one thousand, nine hundred seventy-nine".