66055221216547 has 2 divisors, whose sum is σ = 66055221216548. Its totient is φ = 66055221216546.

The previous prime is 66055221216511. The next prime is 66055221216557. The reversal of 66055221216547 is 74561212255066.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66055221216547 - 2⁷ = 66055221216419 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66055221216494 and 66055221216503.

It is not a weakly prime, because it can be changed into another prime (66055221216557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33027610608273 + 33027610608274.

It is an arithmetic number, because the mean of its divisors is an integer number (33027610608274).

Almost surely, 2^{66055221216547} is an apocalyptic number.

66055221216547 is a deficient number, since it is larger than the sum of its proper divisors (1).

66055221216547 is an equidigital number, since it uses as much as digits as its factorization.

66055221216547 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048000, while the sum is 52.

The spelling of 66055221216547 in words is "sixty-six trillion, fifty-five billion, two hundred twenty-one million, two hundred sixteen thousand, five hundred forty-seven".