66556350347 has 2 divisors, whose sum is σ = 66556350348. Its totient is φ = 66556350346.

The previous prime is 66556350319. The next prime is 66556350359. The reversal of 66556350347 is 74305365566.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66556350347 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66556350295 and 66556350304.

It is not a weakly prime, because it can be changed into another prime (66556355347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33278175173 + 33278175174.

It is an arithmetic number, because the mean of its divisors is an integer number (33278175174).

Almost surely, 2^66556350347 is an apocalyptic number.

66556350347 is a deficient number, since it is larger than the sum of its proper divisors (1).

66556350347 is an equidigital number, since it uses as much as digits as its factorization.

66556350347 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6804000, while the sum is 50.

The spelling of 66556350347 in words is "sixty-six billion, five hundred fifty-six million, three hundred fifty thousand, three hundred forty-seven".