66098857801 has 2 divisors, whose sum is σ = 66098857802. Its totient is φ = 66098857800.

The previous prime is 66098857711. The next prime is 66098857843. The reversal of 66098857801 is 10875889066.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38700332176 + 27398525625 = 196724^2 + 165525^2 .

It is a cyclic number.

It is not a de Polignac number, because 66098857801 - 2²¹ = 66096760649 is a prime.

It is not a weakly prime, because it can be changed into another prime (66098857871) 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, 33049428900 + 33049428901.

It is an arithmetic number, because the mean of its divisors is an integer number (33049428901).

Almost surely, 2^66098857801 is an apocalyptic number.

It is an amenable number.

66098857801 is a deficient number, since it is larger than the sum of its proper divisors (1).

66098857801 is an equidigital number, since it uses as much as digits as its factorization.

66098857801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5806080, while the sum is 58.

The spelling of 66098857801 in words is "sixty-six billion, ninety-eight million, eight hundred fifty-seven thousand, eight hundred one".