66774251522287 has 2 divisors, whose sum is σ = 66774251522288. Its totient is φ = 66774251522286.

The previous prime is 66774251522249. The next prime is 66774251522323. The reversal of 66774251522287 is 78222515247766.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66774251522287 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66774251522207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33387125761143 + 33387125761144.

It is an arithmetic number, because the mean of its divisors is an integer number (33387125761144).

Almost surely, 2^{66774251522287} is an apocalyptic number.

66774251522287 is a deficient number, since it is larger than the sum of its proper divisors (1).

66774251522287 is an equidigital number, since it uses as much as digits as its factorization.

66774251522287 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 158054400, while the sum is 64.

The spelling of 66774251522287 in words is "sixty-six trillion, seven hundred seventy-four billion, two hundred fifty-one million, five hundred twenty-two thousand, two hundred eighty-seven".