66934343291 has 2 divisors, whose sum is σ = 66934343292. Its totient is φ = 66934343290.

The previous prime is 66934343269. The next prime is 66934343327. The reversal of 66934343291 is 19234343966.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66934343291 - 2⁶ = 66934343227 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (66934363291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33467171645 + 33467171646.

It is an arithmetic number, because the mean of its divisors is an integer number (33467171646).

Almost surely, 2^66934343291 is an apocalyptic number.

66934343291 is a deficient number, since it is larger than the sum of its proper divisors (1).

66934343291 is an equidigital number, since it uses as much as digits as its factorization.

66934343291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2519424, while the sum is 50.

The spelling of 66934343291 in words is "sixty-six billion, nine hundred thirty-four million, three hundred forty-three thousand, two hundred ninety-one".